regsvr32 giving error : application configuration file incorrect , how to resolve ?

Question

I have a .net dll which is actually a .NET wrapper for COM , i dont have source of it its third party , when i tried to register it using regsvr32 it gives error

application configuration file incorrect , resintalling may resolve problem 

i checked with Dependency Walker all referenced dlls are loaded also VC++ run time dlls

msvcm90.dll

msvcp90.dll

msvcr90.dll

Microsoft.VC90.CRT.manifest

are present in system32 and also in local directory where that third party dll is placed ? (i am using VS2008) still have error while using regsvr32 , please help !