Check this thread:
http://www.ppcgeeks.com/help-install...gh+memory.html
It's telling me you either a) didn't hard reset correctly, or b) tried to carry over your pim.vol or another backup from a previous rom. The only way to carry over that information from an AKU2.0 rom is through activesync.
Once you take care of these issues, I'll bet txt messaging will fix itself.