Im having trouble registering dll files, I have tried a few different dlls but they all result in similar errors.

I click run, then type,
Regsrv32.exe C:\VB_Stuff\mze.dll

then Regsrv will give me a message like

LoadLibrary("C:\VB_Stuff\mze.dll") Failed.
GetLastError returns 0x00000485

Does anybody know what this error means?

Any help is appreciated.