Can't create new packages in 2008 R2 (Library not registered)

Hi all

Been using SSIS fine for a few weeks. Worked on other projects for a few weeks. Went back to SSIS and cannot create packages. IF I try to create a new SSIS project I get

The error number is 0x8002801D "Library Not Registered"

If I try to add a package to a solution I get:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="Visual Studio - VsTemplate" /> 
  <EventID Qualifiers="49152">1</EventID> 
  <Level>3</Level> 
  <Task>0</Task> 
  <Keywords>0x80000000000000</Keywords> 
  <TimeCreated SystemTime="2012-10-03T21:31:53.000000000Z" /> 
  <EventRecordID>92272</EventRecordID> 
  <Channel>Application</Channel> 
  <Computer>MarksHPEnvy17</Computer> 
  <Security /> 
  </System>
- <EventData>
  <Data>One or more templates do not match any installed project packages.</Data> 
  </EventData>
  </Event>

I've tried registering 32-bit and 64 bit versions of msxml3.dll  and msxml6.dll and reinstalled msxml6 as described here (and many other places)http://support.microsoft.com/kb/2416767

No luck

Other than install a fresh copy of windows (3 days work to get back to a workin system with all apps), I'm stuck

Anyone managed to resolve this?

I'm runnign 2008r2 dev edition on W7 x64. I tried repairing SQL install

Regards

Mark

Mark