game slowdown on sprint touch diamond

[djteqneek]

i tried installing the mega arcade pack on my gfs diamond, but alot of the games lag to the point where games like aquella ball and pipes free 10 seconds at a time making them unplayable. even games like solitare freeze every once in a while for like 10 secs. i flashed it to a completely fresh sprint rom but still the same problems. i had no problems playing these games on my touch pro with the stock sprint rom. is this just how the diamond is?