GPRS not Working on Linkit One

Hi,

I’m working on Linkitone and I have to use GPRS on this development board. But I can’t access any website after connecting to the GPRS network. Whereas WiFi and GSM services are working okay on that board. I also check GPRS services using SIM900A. It’s okay. Kindly tell me how to resolve this issue. I’m using Arduino IDE.