Does the error log have any messages from texis or vortex possibly indicating what the problem is?
Most likely is perms. You must ensure that gw and the cgi texis always run as the same user. The install does this by making them both setuid to the same user. Check the ownerships and permissions on both and make sure they are setuid (chmod u+s) to the same user. And make sure that user is not root. Also make sure the database and webinator directories are owned and writable by that user.
Most likely is perms. You must ensure that gw and the cgi texis always run as the same user. The install does this by making them both setuid to the same user. Check the ownerships and permissions on both and make sure they are setuid (chmod u+s) to the same user. And make sure that user is not root. Also make sure the database and webinator directories are owned and writable by that user.