>Thanx Larry,
>The date of Advapi32.Dll is 05/11/98. But I have some systems running the component that have that date. How about other functions I saw in the Mailmanager's method: RegQueryValueEx, RegCloseKey. The actual error is invlaid number of parameters. Is it possible that some versions of the dll was not as forgiving when it came to passing parameters?

PMFJI, but the declarations are correct, but this error wouldn't show itself until the functions were called. What do the calls look like?