Straight talk Iphone 3gs running 4.1 won't send mms pics?

I have tried everything I can find, and my Iphone 3gs 32gb running 4.1 won't send mms pics. I initially tried straight talks fix, didn't work. My phone is jailbroken. I then installed tether me, and Swirlymms2, and still the phone won't send pics. Can anyone give me a fix for this?

Update to 5.1.1

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