DLL registry for N-Computing

Hi expert,

I am using SAP-B1 (using client )as  an  N-Computing and working fine. However when I am installing Add on then its working on server but not on N-Computing ( using as a client ) and following error through. Is this DLL problem or something else ? kindly help.

System.runtime.interopservices.COMException (0x8000401A): retrieving the COM class factory for component with CLSID {6CF0D1E0-470B-4684-B9B5-70F9A5ACBB06} failed due to the following error: 8000401a.

at New _ExciesCls.setApplication ()