Hi Jinsoo, Can you give more information? Is this your ActiveX object? Is it MFC/ATL ?? When I have issues like this then try debugging the registration of the control, for an ATL example: Put a breakpoint in your DllRegisterServer function. - Goto Project/Settings Menu in Visual Studio - Click the Debug tab on the right-hand side. - Type in "C:\WINDOWS\system32\regsvr32.exe" into the "Executable for debug session" text box - Put the full path of the debug binary into the "Program Arguments" text box Now run the debugger, you will get a dialog box asking if you want to continue (it is just informing you that regsvr32.exe you are running has no debug info.) Click OK and you should soon be put into the DllRegisterServer function, now just drill down until you come across the error. Cheers, Andy
