Try this solution..
If you use PowePacks library in Visual Studio 2011, the Microsoft.VisualBasic.PowerPacks.Vs dll whose version is 11 should be adds into the project.
Remove the reference in your project and then add another reference with version 11. If you can’t find it in the Reference Manger, you can find it in the [ProgramFileFolder] \Reference Assemblies\Microsoft\VBPowerPacks\v11.0 folder.
In addition, to the PowerPacks question,
I think you can get better help in the Visual Basic Power Packs Forum.
http://social.msdn.microsoft.com/Forums/pl-pl/vbpowerpacks/threads[
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