Thought I would check for you on past threads that relate to this topic, and my advice may have been a bit of a wild goose chase. Sorry about that. Try these links as a starter -
A possible solution to your situation:
http://forums.omnigroup.com/showthread.php?t=6813
Other treads dealing with this topic that I recall:
http://forums.omnigroup.com/showthread.php?t=7565
http://forums.omnigroup.com/showthread.php?t=7175
http://forums.omnigroup.com/showthread.php?t=7666