Cannot Show Visual Studio Tools For Application Editor

Hi All,
I was wondering if someone would be kind enough to assist me with the following issue?
Using Visual Studio 2008 and editing an SSIS project. 
Using a data flow task, create a script component, when I attempt to edit the script I get the following error

Cannot show Visual Studio Tools for Applications Editor
Additional Information:
The System Cannot Find The File Specified (Exception from HRESULT: 0x80070002) (EnvDTE80)

I've gone through the following article
http://connect.microsoft.com/SQLServer/feedback/ViewFeedback.aspx?FeedbackID=367845

with no success and I also reinstalled SQL Server 2008 and VS 2008 still with no success
Running on Windows XP SP 2
SQL Server 2008 SP 1
VS 2008 SP 1

Any ideas would be greatly appreciated

Regards
John