Interfacing SIMCOM900A with Arduino UNO

Hi

I am trying to connect to internet by interfacing SIMCOM 900A GSM shield with Arduino UNO. I have been trying below APN settings for Idea SIM (in India) but always getting ERROR as output. I am not sure if its a syntax problem or something else. Any help?

mySerial.println("AT+CSTT=\"internet/imis\","","""); mySerial.println("AT+CSTT=\"internet\","",""");

Note: username and pwd is blank.

Shriram