well if thats what helped you fine but that type of cookie is only valid on that one domain name meaning your forum and classifieds better both be installed on hunting-washington.com not
Hunting Washington etc.
If you want cookies to be read over your entire domain name both applications need to create site wide cookies. I know in SMF there is a setting to do local or site wide. You need to use site wide. Local makes then valid only over the forum.