I have a rooted Samsung Indulge which works fine (on Cricket of course) in all respects except for one issue: I am not able to send MMS with any other client than the built in one. The built in one sends fine while clients like Handcent, GO SMS and a couple of others won't send MMS. They just grind trying to send and I then have to interrupt and delete the message or it will try to send forever.

My preferred SMS client is GO SMS. Is there a way I can get it to send MMS, or am I stuck with the built in client on this phone?