Jak skonfigurować GPRS na module ZTE MG2639? AT komendy nie działają

Hi;

I´m starting to use MG2639, and I have a hard begin. Poor ZTE documantion and no aplications notes. My module MG2639, respond AT commands and:

1 - SIMCARD is OK
2 - Antenna is OK
3 Power supply is OK.
4- Network LED show me is "registered"

The module no have GPRS connection, Please somebody send me a AT command script for GPRS connection ? I tried many commands and no success.

ATE0
OK

AT+CPIN?
+CPIN: READY
OK

AT+CMEE=1
OK

AT+CSQ
+CSQ: 18, 99
OK

AT+COPS?

+COPS: 0,0,"72405"
OK

AT+CREG?
+CREG: 0, 1
OK

AT+CGATT?
+CGATT: 0
OK


AT+ZPNUM="generica.claro.com.br","claro","claro"
OK

AT+ZPNUM?
APN:generica.claro.com.br
USER:claro
PWD:claro
OK

AT+CGATT=1
+CME ERROR: 100

thanks