Mms Blank?

I am new to this site and recently purchased an ATT BB 8310! The last BB I had was the blue Nextel about 6 years ago, if not longer! Anyway, I have a MMS question. A friend of mine who is also on AT&T but not a BB, sends me MMS a few times a week, when it arrives on my BB the message area is blank, if I foward the MMS to myself it shows up with no problem! Anyone have any idea why I need to foward it for it to be visible. I hope I explained myself alright! Thanks!

What type of MMS? Are you forwarding via email or? What type of phone does your friend have?

They are MMS's with photo's and sound, some are GIF's. His phone is a Sony, its a media player type phone.