[Q] MMS Acting crazy...

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So I have my Evo 4G flashed to MetroPCS... the Internet works, Market works, everything... except for MMS. I can RECEIVE a picture message with no issues, and it is SUPER fast, but I cannot SEND a picture message. When I try to send, it just says sending, but the status bar shows no web activity and it will say sending forever. I have flashed the required MMS Scripts, flashed different ROMs, everything. I am currently on CM7.2.

Can someone please help me?