Error: Could not load file or assembly 'AjaxControlToolkit, Version=1.0.11119.20010

Hi,

We have successfully integrated the AjaxControlToolkit into our beta website.  I installed the latest release for .NET Frameowrk 2.0 from here:  http://www.codeplex.com/AtlasControlToolkit/Release/ProjectReleases.aspx?ReleaseId=8513

 Everything was going swimmingly until this morning when our test server started giving us this error when trying to load a page that contains an Ajax control from the toolkit: 

Parser Error

Description:An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load file or assembly 'AjaxControlToolkit, Version=1.0.11119.20010, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Source Error:

Line 1:  <%@ Control Language="vb" AutoEventWireup="false" CodeBehind="KeywordTabbedContainer.ascx.vb" Inherits="Share.KeywordTabbedContainer" %>

Line 2:  <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
Line 3:  <%@ Register TagPrefix="wv" TagName="Keywords" src="KeywordChooser.ascx" mce_src="KeywordChooser.ascx" %>

I decided to reinstall the toolkit with the .vsi file and, as before, the version on my referenced c:\Program Files\Microsoft Visual Studio 8\Common7\IDE\AjaxControlToolkit\SampleWebSite\Bin\AjaxControlToolkit.dll is 1.0.10618.0.  As far as I can tell, I did not make any changes to the toolkit (I have the code as well).

The project still runs fine on my local machine and we're stumped.  I have two questions:

1.  Firstly - any help with solving the above error is greatly appreciated.

2.  Why is my version still 1.0.10618.0 when I know I installed the latest, which is supposed to be version1.0.11119.0?

Thank you,

Mark