ATT help plz

[stormshadow419]

I have an imagio that is sim unlocked and hspl unlocked done the work by myself but i cant seem to get the picture messages to work ....and i have this device on a att prepaid account...had a blackberry storm unlocked on the same card and still got my picture messages....is there a setting that im missing or maybe a cab file to fix this issue??????any help would be great....