Update Panel shows data from multiple users

Hello,

I have a web app with multiple pages relating to performing Exchange tasks for non exchange administrators.

One of these pages will allow a user to view / add / remove permissions from a mailbox.

It works fine, but the viewing takes around 40 seconds because of all the calls to exchange cmdlets.

So, I thought I'd add an Update Panel and provide progress on each step. 

That works great if only one user uses the page at a time, but if multiple people run it, the data is either combined for both or one person gets the other's data.

This is my update panel:

<asp:UpdatePanel ID="pnlResults" runat="server" UpdateMode="Conditional" Visible="false" ChildrenAsTriggers="false"><ContentTemplate><asp:Label ID="lblResults" runat="server" Height="150px"></asp:Label><br /><asp:TextBox ID="txtProgress" runat="server" Visible="false" TextMode="MultiLine" BorderStyle="None" Width="95%" Style="overflow: hidden;" AutoPostBack="false"></asp:TextBox><br /><br /><asp:Table ID="thePermissionTable" runat="server" AutoPostBack="true" BorderStyle="None"></asp:Table><br /><asp:Button ID="btnRemoveAccess" runat="server" Visible="false" Text="!Remove Access!"></asp:Button><br /><asp:Button ID="btnBack" Text="Return" runat="server" OnClick="BtnBack_Click" Visible="true" AutoPostBack="true"></asp:Button><asp:TextBox ID="txtPermissionToRevoke" runat="server" Width="0px" Height="0px" BorderStyle="None"></asp:TextBox><asp:TextBox ID="txtSendOnBehalf" runat="server" Width="0px" Height="0px" BorderStyle="None"></asp:TextBox><asp:TextBox ID="txtSendOnBehalfToRevoke" runat="server" Width="0px" Height="0px" BorderStyle="None"></asp:TextBox></ContentTemplate><Triggers><asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" /></Triggers></asp:UpdatePanel>

This is timer1_tick:

protected void Timer1_Tick(object sender, EventArgs e)
    {
        if (inProcess)
        {
            txtProgress.Rows = content.Split('\r').Length + 1;
            txtProgress.Text = content;
        }
        if (processComplete && content.Substring(content.Length - processCompleteMsg.Length) == processCompleteMsg) //has final message been set?
        {
            inProcess = false;
            btnNext.Visible = false;
            btnBack.Visible = true;
            txtProgress.Text = content;
            if (tableDone)
            {
                if (rdoAction.SelectedValue.ToString().ToLower() == "remove-access")
                {
                    pnlButtons.Visible = true;
                    btnRemoveAccess.Visible = true;
                }
                thePermissionTable.Visible = true;
            }
            Timer1.Enabled = false;
        }
        else
        {
            if (displayTable)
                CreateTable();
            if (rdoAction.SelectedValue.ToString().ToLower() == "remove-access")
            {
                pnlButtons.Visible = true;
                btnRemoveAccess.Visible = true;
            }
        }
    }

I start the process with my button click in RaisePostBackEvent like so:
                   switch (action)
                    {
                        case "display-access":
                            Timer1.Enabled = true;
                            inProcess = true;
                            pnlButtons.Visible = false;
                            Thread workerThread = new Thread(new ThreadStart(() =>
                            {
                                FnGetCurrentAccess();
                            }));
                            workerThread.Start();
                            break;
}

FnGetCurrentAccess() does almost all of the exchange cmdlets by calling my commonfunctions class, and adds to the content which is a private static string.

I have no idea how to make this work, so I appreciate any ideas.

Karl