nope didnt work

i dont even know what mms is...thats just where my picture messages goes in that folder..my reg. txt messages go in the ..text message folder..but i have the plan to send and recieve pic messages because before i got this phone i sent/recieved..i think i know how to fix the problem..in the mms menu it asks (stuff below) i think some of that stuff is suppose to be diff. but i dont know what..

name: cingular mms

mmsc url:http://mmsc.cingular.com

wap gateway: wireless.cingular.com

port:80

connect via: the internet

max swnding size: 300k

wap version: wap 2.0

cingular 2125 is unlocked ..provider is t mobile ..i cant download my pic messages or send pic messages..it just stays in my mms folder..can someone help me please..