I looked it up on my copy of 2005. The help for "Visual Studio Hosting" sy that certain API calls conflict with this setting when it's enabled. So you must disable it.

Disabling this option will cause debuggin to take longer, and certain new features that were added for 2005 will not work.



>Oh wait ... rather than enable Terminal Services, another person in that thread suggested this:
>
>Projects---Projectname Properties--Debug---Disable vs hosting
>
>Sounds like a better solution to me (unless you need having Terminal Services enabled anyway).
>
>~~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
>>---------------------------
>>