At&t pantech crossover on straighttalk can't send or receive pics?

I got a pantech crossover from a friend, decided to put my straighttalk sim in it which was previously in my iphone 3gs. Neither phone has been able to send or receive pics with this sim. Does anyone know how to fix this issue? I already put in the straighttalk APN and everything, CAN this be fixed?

I called AT&T with same problem for my husband and my Pantech Ease Phones. After speaking with 3 customer service reps, the 4th one said Pantech is having a "national problem". They have no timeline when this issue will be corrected or what exactly is the problem. I can send and receive text msg but no pictures. I'm not very happy at this moment, but I'm receiving a credit to my phone bill.

wkr p