Why is MMS locking up my phone? Please help!

[jstevanus]

Whenever I get an MMS picture message, my phone is almost completely locked up when I'm viewing my main messages list screen. I've tried using different SMS apps like GoSMS, and Handcent, and nothing helps. Basically, someone sends me a picture, and if I click on it, it takes about 10 seconds before the message even opens. Then, I see a thumbnail of the pic, but I can't even type a text to reply because it's so locked up. I have to hit Home, then go back to my messages, then delete the thread with the picture in it so that I can send a text again. I've searched like crazy, for hours, looking for a solution and nothing has worked. Please, somebody give me some kind of suggestion maybe I haven't tried yet!