Nokia E61i

I cannot send or receive MMS picture messages on my e61i. Prior to this, I had a 6230 that wouldn't do it either. Then I had the N80 for a while and could send MMS msgs with ease. I assumed that since the e6ii & the N80 have a similar OS, that I would have no problems. When I try to send a picture, it just keeps trying to send until i give up and stop it. Incoming MMS msgs never come in. Is there a setting that I haven't found that I need to change? I have the Euro-version of the N*0 & e61i, so I can't see that being hte problem.