Hey guys .. I have an iPhone 2G which i jailbroke & unlock with Redsn0w

iPhone Firmware - 3.0

My iPhone is detecting the Wifi and gets connected to it .But There is an "E" Symbol at the Top left , Where is the Wifi signal is suppose to be.

When i try connecting to the net , it says that the " Data Cellular Network cannot be activated" and Sometimes " safari could not open the page because the server stop responding"

I have no clue what to do .. I tried Reseting the Network Setting & reboot the firmware , But that's of No use.

I think u people might know a way out ..