Load DLL Librfc32.dll failed

Hello,

I wrote a little test program to connect to SAP server and call one RFC .

It works fine on my development PC. But on the deployment PC every time I try to connect to the SAP server a error message appear.

Unable to load dll (librfc32.dll). ... Exception HRESULT:8007007E

But I had copy this file from my development PC to the deployment PC to c:\windows\system32 and to the application directory where also the sap.connector.dll's are stored.

Both PCs are running WinXPSP2.

Has anybody an idea what is wrong ?

Thanks

Jens