problem with t-mobile and mightyroms

[gramby]

first i bought my tp2 on ebay unlocked. I then hard spl unlocked it. after trying a few stock roms I tried mightyroms which I love thanks mightymike. now I'm trying to use my phone with prepaid t-mobile (bought the sim). I have tried changing most of the setting but all I get is an ! by the radio sign. the phone was on uscellular before. I tried looking though the mightyroms thread but I did not see anything. and yes I am pretty new at this but thank you in advance for any help provided.