wierd mms problem. mms is active on each line but..

[punkgirl]

hi oaky i am having a problem getting my swirly mms to work.
i have 2 phones. the iphone and the att tilt. i am on a family share plan. the iphone is on the media net unlimited and the tilt is on the pda internet package. i have a cingular card in my iphone and a att card in my tilt. Windstream is my provider but underwrites att/cingular. i do have mms active on each line.
the problem is that i cannot send or recieve mms when i have the orange cingular sim card in my iphone but when i switch the sims card and put the blue att card in my iphone i can send and recieve messages that way.
is there different settings for the orange cingular sim card and the blue att card??

[cpjr]

The settings should be the same. Your lucky you got it working on at least one sim, most of the time it wont. Its likely just because its an older sim.