Im trying to activate my new G1 on att and im having some trouble. Im setting up a new APN with these settings and can not connect to gmail.

Name: AT&T
APN: wap.cingular
Proxy: leave blank
Port: leave blank
Username:WAP@CINGULARGPRS.COM
Password:CINGULAR1
Server: leave blank
MMSC: http://mmsc.cingular.com
MMS Proxy: wireless.cingular.com
MMS Port: 80
MCC:310
MNC:410 (note. this could also be 310, 41 or 15)
APN Type: leave blank

when i use these settings it wont connect so i tried changing the MNC to 310, 41 or 15 but whenever i try to use these ones the APN wont save the configuration. I click menu and save but it just erases everything...dont know what to do.

any and all help would be appreciated.