Wavecom WMOD2 900P



I am a software engineer from the Netherlands. I am trying to build an application which can send AT commands and send SMS with the Wavecom. I have a GSM-modem model WMOD2 900P. When i putt a prepaid card from Telfort in it i get an error:30 (no network) when i give the AT+COPS=? command

I also get an answer +CSQ 99,99 when i give the command AT+CSQ?

What can be the problem??? Al the other AT commands are not a problem (so it seems).

How can i fix this?