Have you manually taken any apk's from the system/app folder? I think there are a few that are necessary in order to allow mms to work. I had this problem before and it was because I flashed a theme thinking it was allowed and it wasn't so I started from scratch. It might be beneficial for you to either deal with the lack of mms for a minute until the final release (since you have to full wipe anyway) or just full wipe and start from scratch right now.
Thank you for the reply. Yeah I experienced the loss of mms because of flashing a theme a while back. I may wait for final release. If I can't I'll wipe, as you said.. Thanks again..
Sent from my ADR6300