Kandee - Do you post on the IBS Support Group Boards? If you are registered, and you go into My Home, under your preferences, the last questions is "Accept private messages from other users?" and you choose Yes or No. They have PMing enable. I guess since the IBS Message Boards don't have it enabled, that question doesn't show up under the preferences for IBS Message Boards.
I hope I'm not confusing you! Or myself for that matter!