SIM900 GPRS Shield V2.0 AT commands

Hello As my first serious ardiuno project, i am trying to make the arduino uno send me a sms when someone enters a certain room. I have setup the arduino and installed the SIM900 GPRS Shield without any problems. I am using a unlocked FreeMobile sim card (France). When I power on the shield the green LED blinks every three seconds.

By following this wiki I have gotten to step 4 of Fun With AT commands > Step 1: Test Setup http://www.seeedstudio.com/wiki/GPRS_Shield_V2.0

However I am unable to communicate with the shield through sscom32e (the recommended serial tool). I have chosen the correct com number (the one i successfully used to upload the basic blink example to the arduino) and I have set it to operate at 19200 8-N-1.

When following the next steps, i get this result :

AT+IPR=19200
OK
AT+CMGF=1
ERROR

I have tried getting a more detailled error without success

AT+CMEE=1
ERROR

And i have tried to see if text mode is supported again without success

ERROR
AT+IPR

Thank you in advance for the help Blabby

What happens if you just send the AT command?

It connects

AT
OK