I had the same problem. I called i wireless and they walked me through it. It is fixed. you have to go to settings; wireless and networks; mobile networks; access point names; change the web 2 to web 1. You have to do this every time you send a pic, or recieve. I hope this helps!
That sounds like you are doing it the hard way. There must be a better way to do it which doesn't involve going into the settings like that every time. What kind of phone do you have?