ModalPopupExtender disables asp controls in in other webparts

Hi,

I am having problems getting a ModalPopupExtender ajax control to work on a page.

I have a single page containing 4 or 5 web parts displaying data from a sql database.  I want to add a ModalPopupExtender that will open a popup for me to enter data into the same database.  I have got the popup opening, validating imput and saving the record on close, but when the extenders code is on the page it disables the <asp:LinkButton> on the other web parts.  These link buttons open datalist EditItmTemplate> that are on the other web parts.

If I remove any reference to the ModalPopupExtender, the link buttons work.

A stripped down version of the code is below:

The ASPX code (recruits.aspx):

<form id="frmRecruits" runat="server"><ajaxtoolkit:toolkitscriptmanager ID="AjaxToolkitScriptManager" runat="server"/><asp:WebPartManager ID="wpmRecruits" runat="server" OnAuthorizeWebPart="wpmRecruits_AuthorizeWebPart"><StaticConnections><asp:WebPartConnection ID="wpConnRecruitDetails"
                    ConsumerID = "idRecruitDetails"
                    ProviderID="idRecruitAdminTools"
                    ConsumerConnectionPointID="SelectedRecruit"
                    ProviderConnectionPointID="SelectedRecruit" /></StaticConnections></asp:WebPartManager><div id="leftNav"><asp:LinkButton ID="linkAddNewRecruit" runat="server" Text="new recruit"  /><asp:webpartzone id="wpzLeftSideBar_01" runat="server"><ZoneTemplate><ucRecruitAdminTools:RecruitAdminTools ID="idRecruitAdminTools" runat="server" title="Recruit"/></ZoneTemplate></asp:webpartzone></div><div id="content"><div id="centreContent"><asp:WebPartZone ID="wpzCentre" runat="server"><ZoneTemplate><ucRecruitDetails:RecruitDetails ID="idRecruitDetails" runat="server" title="Contact Details"  /></ZoneTemplate></asp:WebPartZone></div></div><asp:Panel ID="panelAddNewRecruit" runat="server"  CssClass="modalPopup"><div style="border: 1px solid #000000"><table style="background-color: #e3e2fe;"><tr><td>Interview Date</td><td><asp:TextBox ID="txtInterviewDate" runat="server"/><ajaxToolkit:CalendarExtender ID="calInterviewDate" runat="server" TargetControlID="txtInterviewDate" /></td><td>Unit</td><td><asp:DropDownList ID="ddlUnitID" runat="server"><asp:ListItem Text="-Select Unit-" Value= ""></asp:ListItem><asp:ListItem Value="2643" Text="PE" /><asp:ListItem Value="2641" Text="FA" /></asp:DropDownList></td></tr><tr><td>FirstName</td><td><asp:TextBox ID="txtFirstName" runat="server"/><asp:RequiredFieldValidator ID="vldTxtFirstName" runat="server" ErrorMessage="* Required" ControlToValidate="txtFirstName" /></td><td>MiddleInitial</td><td><asp:TextBox ID="txtMiddleInitial" runat="server"/></td><td>LastName</td><td><asp:TextBox ID="txtLastName" runat="server"/><asp:RequiredFieldValidator ID="vldTxtLastName" runat="server" ErrorMessage="* Required" ControlToValidate="txtLastName" /></td></tr><tr><td>Address</td><td><asp:TextBox ID="txtHomeAddress" runat="server"/></td></tr><tr><td>City</td><td><asp:TextBox ID="txtHomeCity" runat="server"/></td><td>State</td><td><asp:TextBox ID="txtHomeState" runat="server"/></td></tr><tr><td>ZipCode</td><td><asp:TextBox ID="txtHomeZipcode" runat="server" />-<asp:TextBox ID="txtHomeExtZipcode" runat="server"/></td></tr><tr><td ><asp:LinkButton ID="linkInsert" runat="server">Insert</asp:LinkButton><asp:LinkButton ID="linkCancel" runat="server">Close</asp:LinkButton></td></tr></table></div></asp:Panel>

<ajaxToolkit:ModalPopupExtender ID="mpeAddNewRecruit" runat="server" 
                TargetControlID="linkAddNewRecruit"
                PopupControlID="panelAddNewRecruit" 
                BackgroundCssClass="modalBackground" 
                DropShadow="true" 
                CancelControlID="linkCancel" ></ajaxToolkit:ModalPopupExtender></form>

ASCX code for one of the web parts (wpRecruitsDetails):

<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="wpRecuitsDetails.ascx.vb" Inherits="PayPer_WebParts.wpRecuitsDetails" %><asp:DataList id="dataRecruitDetails" runat="server" DataKeyField="PersonID" 
        DataSourceID="dsRecruitInfoByID" 
        OnEditCommand="dataRecruitDetails_EditCommand" 
        OnCancelCommand="dataRecruitDetails_CancelCommand" 
        OnUpdateCommand="dataRecruitDetails_UpdateCommand"><ItemTemplate><%-- <asp:LinkButton ID="linkEdit" runat="server" CommandName="edit">edit</asp:LinkButton>--%><asp:Button ID="linkEdit" runat="server" Text="Edit" CommandName="edit" /><br /> <br /><asp:Label ID="lblFirstName" runat="server" Text='<%# Eval("FirstName") %>' /><asp:Label ID="lblMiddleInital" runat="server" Text='<%# Eval("MiddleInitial") %>' /><asp:Label ID="lblLastName" runat="server" Text='<%# Eval("LastName") %>' /><br /><br /><strong>Date Hired</strong><asp:Label ID="lblDateHired" runat="server" Text='<%# Eval("DateHired","{0:MMM-dd-yyyy}") %>' /><strong>Interview Date</strong><asp:Label ID="lblInterviewDate" runat="server" Text='<%# Eval("InterviewDate","{0:MMM-dd-yyyy}") %>'/><br /><br /><strong>Address</strong><br /><asp:Label ID="lblHomeAddress" runat="server" Text='<%# Eval("HomeAddress") %>' /><br /><asp:Label ID="lblHomeCity" runat="server" Text='<%# Eval("HomeCity") %>' /><asp:Label ID="lblHomeState" runat="server" Text='<%# Eval("HomeState") %>' /><asp:Label ID="lblHomeZipcode" runat="server" Text='<%# Eval("HomeZipcode") %>' /><asp:Label ID="lblHomeExtZipcode" runat="server" Text='<%# Eval("HomeExtZipcode") %>' /><br /></ItemTemplate><EditItemTemplate><asp:LinkButton ID="linkUpdate" runat="server" CommandName="update">update</asp:LinkButton>&nbsp;<asp:LinkButton ID="linkCancel" runat="server" CommandName="cancel">cancel</asp:LinkButton><br /><asp:TextBox ID="txtFirstName" runat="server" Text='<%# Eval("FirstName") %>' /><asp:TextBox ID="txtMiddleInitial" runat="server" Text='<%# Eval("MiddleInitial") %>' /><asp:TextBox ID="txtLastName" runat="server" Text='<%# Eval("LastName") %>' /><br /><br /><strong>Date Hired</strong><asp:TextBox ID="txtDateHired" runat="server" Text='<%# Eval("DateHired","{0:MMM-dd-yyyy}") %>' /><ajaxToolkit:CalendarExtender ID="calDateHired" runat="server" TargetControlID="txtDateHired" /><strong>Interview Date</strong><asp:TextBox ID="txtInterviewDate" runat="server" Text='<%# Eval("InterviewDate","{0:MMM-dd-yyyy}") %>' /><ajaxToolkit:CalendarExtender ID="calInterviewDate" runat="server" TargetControlID="txtInterviewDate" /><br /><br /><strong>Address</strong><br /><asp:TextBox ID="txtHomeAddress" runat="server" Text='<%# Eval("HomeAddress") %>' /><br /><asp:TextBox ID="txtHomeCity" runat="server" Text='<%# Eval("HomeCity") %>' /><asp:TextBox ID="txtHomeState" runat="server" Text='<%# Eval("HomeState") %>' /><asp:TextBox ID="txtHomeZipcode" runat="server" Text='<%# Eval("HomeZipcode") %>' /><asp:TextBox ID="txtHomeExtZipcode" runat="server" Text='<%# Eval("HomeExtZipcode") %>' /><br /></EditItemTemplate></asp:DataList>

I also tried putting the popcontrol into its own ASCX web part and it would cause the same problem (and if I removed it from the <ZoneTemplate> the EditItemTemplates would work again).

Any suggestions?  I can post more code if need be

thanks

Ian