Got all working.
1- delete any APN you have create before and end up just with the ATT that can be deleted.
2- create NEW APN.
Name: Straight Talk
APN: att.mvno
Proxy: proxy.mvno.tracfone.com
Port: 80
MMSC: http://mmsc.cingular.com
MMS Proxy: 66.209.11.33
MMS Port: 80
Do not change anything...