Default [Q] build.prop unlock, need mms settings for att gophone

I unlocked my sprint g2 with the build.prop method and then flashed justin's rom. then I changed the apn to this one:
apn: phone
proxy: not set
port: not set
username: not set
password: not set
mmsc: mmsc.cingular.com (with http in front)
mms proxy: wireless.cingular.com
mms port:80 (ive tried 8080 too)
mcc:310
mnc:410
authentication type: none
apn type: default
apn protocol: IPv4

Everything works, but MMS. data works, normal text works but I cannot send or receive MMS. Can anyone share their MMS settings for att gophone? or do I have to change something else? Thank you