p2k7,
All should be answered on this thread:
http://forum.ppcgeeks.com/showthread.php?t=9841
When you post again over there, please be sure to specify your rom build (there have been 7 by Rob), your carrier, and whether you ran extended rom customizations. There were MMS problems in the early builds, and Rob left it out of several - looks like it's back in b7. Good luck. tmb