try this, it is supposed to fix the size issues. DaDoctor over at xda put it together.
EDIT: cab does not fix the issue, but I found the reg edit that does
Navigate to HKLM\Software\Jataayu\MMS\Profiles
Within profiles there should be 2 different keys 000, and 999. In each change the send limit value to 5000 and you should be good to go!