Unfortunately, I've not done a whole lot with VS 2005 yet, so I've not encountered this error. Did you Google on the error message? I did and found this:

http://weblogs.asp.net/coltk/archive/2005/11/16/BindingHandleIsInvalid.aspx

It sounds promising. Apparently Terminal Services needs to be running. Go figure.

~~Bonnie




>>You need to right click on the 2nd project and click on "Set as Startup Project"
>>
>>~~Bonnie
>
>Bonnie, thanks for the quick reply!
>
>I set the second project as "Startup Project" as you suggested, then press F5. I'm still getting the same error:
>

>---------------------------
>Microsoft Visual Studio
>---------------------------
>Error while trying to run project: Unable to start debugging.
>
>
>
>The binding handle is invalid.
>
>
>---------------------------
>OK
>---------------------------
>