12a MMS

I am on 12a rooted. Today I tried to send a picture message for the first time since the 12a OTA. It will not send for anything. Always says Send Failed. Would you like to retry? I've tried a bunch of stuff; switching network modes, re-flashing my rooted system image, factory reset, nothing works. But I can receive pictures. I've checked MMS registration and it says Registered. Anyone else notice this problem or any ideas as to what may be the problem?

Thanks