ArcObject 9.3 to ArcObject 10

Hello!

I wrote a software programm in VB.net and ArcView9.3.
To be able to change in a pGDB the attributes of the feature-class I have embadded the following references
Esri.ArcGis.Geodatabases
Esri.ArcGis.Geometry
Esri.ArcGis.System
Recently I have changed to ArcView 10 and installed the ArcObject SDK 10.
I replaced the reference from ArcView 9.3 with ArcView 10.
Due to this I receive the following error message:
Retrieving the COM class factory for component with CLSID {FDFEBD95-ED75-11D0-9A95-080009EC734B} failed due to the following error: 80040111

I need help to solve this problem.