cant send mms(StepbyStepHelp)

[suga_d]

ok im probably going to be the slowest newbee ever. i have i touch pro 2 on boostmobile. everything runs fine expect sending mms(i can recieve but cant send) i had someone flash it from outta town and he says he doesnt know why that is. i searched alot of post and found out some things but not to tha problem i have or type of specs i have. im goin to tell you everything i know about my setup.

1 sprint tp2 wm6.1 on boost but it has a sim card(its a sprint sim card)
2 calld boost and they said im on tha blackberry plan or that i have a
a blackberry plan or a blackberry and they cant trouble shoot.

ive seen the boostmmsfix, and the arcsoftmms5.2.6. cabs but i dont know where to save it on my phone or will it work. step by step instructs is hard to find. plz help.