Did you restart the server after changing the functions? Changes to library functions don't take effect until you force resourcing of the library, and restarting the server's a handy way to force that...
Other than that, your subject line pretty much pinpoints the problem. For some reason some the check routines are getting "" rather than "0" or "1" back from mod_aolserver when they check for the value.
As to why, I don't have a clue as I'm strictly an AOLserver/OpenACS kinda guy ... anyone else have any ideas?
