I've installed the latest version of ASP.NET Web Application Projects and
created a new project of this type (all prerequisites are present).  When
attempting to view the "Web" tab in the project Properties, I get the
following message along side a red X:

Unable to cast object of type
'Microsoft.VisualStudio.Web.Application.WAProjectHolder' to type
'Microsoft.VisualStudio.Web.Application.WAProjectHolder'.

Then, after I go to another tab then back to this tab, the message changes to:

An error occurred trying to load the page.
Unable to create the designer.  File is already opened in an incompatible
editor.

Fortunately, the projects to otherwise work.  I can get to all other tabs
(Though, some items seem disabled when they should be enabled) and the
application is both runnable and debuggable.

My configuration is as follow:

OS: Windows XP x64
VS Version: Visual Studio Team Suite (VLK)
CPU: AMD Athlon FX-62 (2.8 GHz)

Can someone please help me to get this tab working?

If it's going to be broken for a while, can I manually add and change
attributes in the CS file like the tag:
<AssemblyOriginatorKeyFile>..\..\BinRef\NVIDIA.snk</AssemblyOriginatorKeyFile>
In the same way I would for other project types?

Thanks,

~Sean