It sounds like somewhere in your code you are calling the method 'expired' on a CGI::Session object. This is not a valid method call. The reason you are not getting a standard perl error message is because CGI::Session uses AutoLoader to load less frequently used functions. 'expire' and 'expires' are two valid methods that are autoloaded on demand, and hence you found the files expire.al and expires.al. See the perldocs for AutoLoader for more info on how it works.

-Cees