Hello We migrated our .net 1.1 com+ application and windows client to .net 2.0. We build both applications for x86 platform. Then we installed COM+ application on Windows Server 2003 R2 (64-bit) using regsvcs applicationname.dll. After that using component services add in we exported both server and proxy msi. Then we removed COM+ application using regsvcs /u applicationame.dll. Now we reached the first problem. After running server msi on the same server where it was created we received following errors and installation failed: Error 1928. Error registering COM+ (Application log), One or more files do not contain components or type libraries. These files cannot be installed (Component Install dialog) One or more components could not be installed Error 80110802 occurred (Errors occurred dialog) Running proxy msi on xp work station (32-bit) went without problems. Then we installed win application which did not work be we did not received error that we expected (missing server or something like that). It was missing dll. After checking ProgramFiles/ComPlusApplications/{xxxxx} we found out there is no com+ proxy dll file in there just tlb file, and there is no dll in GAC. Any ideas?