VS2008 unable to load Integration Services package document after creation

Question

Upon creating a new IS project in Visual Studio 2008, I get this error message in a tabbed window:
"Microsoft Visual Studio is unable to load this document: To design Integration Services packages in BI Development Studio, IS has to be installed by one of these editions of SQL Server 2008: Standard, Enterprise, Developer, or Evaluation.  To install IS, run SQL Server setup and select Integration Services."
But I do have IS installed.  I have two databases, one from the free Express Advanced edition and one from Developer edition.  SQL 2008 setup (Developer edition) shows IS installed as a shared component.  I installed the Express edition before later installing the Developer edition and had no problems.  What needs to be done here?  Help, and thanks for any help!
I experienced this problem while running and following a video tutorial "Creating a Basic Package," from this MSDN site:
http://msdn.microsoft.com/en-us/library/cc952921.aspx
If it helps, I have .NET 3.5 SP1 installed.

Answer 1

Most likely its MSXML, which is the most common one to get damaged since it supports multiple side-by-side install and uninstalls, but doesn't repair itself during SQL reinstall.
Try this:
1. Manually re-register the MSXML6 Dlls on the system where you are experiencing the problem by executing the following commands at a command prompt (you need to run these
commands from an Administrative Command prompt on the newer operating systems.)
On a 32-bit machine:
regsvr32 %windir%\system32\msxml6.dll
regsvr32 %windir%\system32\msxml3.dll
On a 64-bit system, reregister both the 32-bit and 64-bit Dlls:
regsvr32 %windir%\system32\msxml6.dll
regsvr32 %windir%\system32\msxml3.dll
regsvr32 %windir%\SysWOW64\msxml3.dll
regsvr32 %windir%\SysWOW64\msxml6.dll
 2. Restart the failing application. For example, if BIDS is experiencing the error, close BIDS and start it again. Test the application in the same way which generated the error noted in the symptoms section.
3. If you are still experiencing the problem after Step 2, you may need to reinstall MSXML6 and then run Windows Update to ensure that the MSXML dlls are patched with the latest security updates. You can download MSXML6 from the following location:
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=993c0bcf-3bcf-4009-be21-27e85e1857b1&displaylang=en
4. If that doesn't so it, you can run process monitor and see which COM class id in the registry, which dll, or which GAC Native Image or Assembly is out of wack.
Download Process Monitor tool,
and run it to monitor with filter process name = devenv.exe
and examine the logs of the tool to see if registry keys are reported as NAME NOT FOUND or ACCESS DENIED.
On another thread, they COM was out of wack:
http://social.msdn.microsoft.com/Forums/en-US/sqlintegrationservices/thread/52b10adf-1c8b-4f30-918c-b199ce50155b
regsvr32 oleaut32.dll
regsvr32 actxprxy.dll
Thanks, Jason 
Didn't get enough help here? Submit a case with the Microsoft Customer Support team for deeper investigation - http://support.microsoft.com/select/default.aspx?target=assistance