Visual Studio 2008 The Missing F# Visual Studio Add-In

Hi there,
After I have installer Microsoft Visual Studio 2008 on my PC this error appears when I want to open the program. I did a small research on the Internet and nothing seems like to solve this error. Can any of you experts help me to solve this error ? What could be the problem ?
Thank you !

Visual Studio 2008
Error loading the code Window context menu item.
