Problems with starting up the GSM Module

Hardware Arduino GSM Shield
1

Hello!

I try to make my ICOMSAT 1.1 gsm shield work. I can't get it on. Output from this code:

#include "SIM900.h"
#include <SoftwareSerial.h>
#include "sms.h"

SMSGSM sms;
 
char number[]="+40741405354";
 
void setup()
{
	Serial.begin(9600);
	if (gsm.begin(2400))
		Serial.println("\nstatus=READY");
	else 
		Serial.println("\nstatus=IDLE");
	sms.SendSMS(number,"Ce fai maci?");
	delay(1000);
}
 
void loop()
{

}

is:

DB:NO RESP
DB:NO RESP
DB:NO RESP
Trying to force the baud-rate to 9600

ERROR: SIM900 doesn't answer. Check power and serial pins in GSM.cpp

status=IDLE

I use this library: Google Code Archive - Long-term storage for Google Code Project Hosting.

And the piece of this library that sends me that error is:

for (cont=0; cont<3; cont++){
		if (AT_RESP_ERR_NO_RESP == SendATCmdWaitResp("AT", 500, 100, "OK", 5)&&!turnedON) {		//check power
	    // there is no response => turn on the module
			#ifdef DEBUG_ON
				Serial.println("DB:NO RESP");
			#endif
			// generate turn on pulse
			digitalWrite(GSM_ON, HIGH);
			delay(1200);
			digitalWrite(GSM_ON, LOW);
			delay(10000);
			norep=true;
		}
		else{
			#ifdef DEBUG_ON
				Serial.println("DB:ELSE");
			#endif
			norep=false;
		}
	}
	
	if (AT_RESP_OK == SendATCmdWaitResp("AT", 500, 100, "OK", 5)){
		#ifdef DEBUG_ON
			Serial.println("DB:CORRECT BR");
		#endif
		turnedON=true;
	}
	if(cont==3&&norep){
		Serial.println("Trying to force the baud-rate to 9600\n");
		for (int i=0;i<8;i++){
		switch (i) {
			case 0:
			  _cell.begin(1200);
			  _cell.print(F("AT+IPR=9600\r"));
			  break;
			  
			case 1:
			  _cell.begin(2400);
			  _cell.print(F("AT+IPR=9600\r"));
			  break;
			  
			case 2:
			  _cell.begin(4800);
			  _cell.print(F("AT+IPR=9600\r"));
			  break;
			  
			case 3:
			  _cell.begin(9600);
			  _cell.print(F("AT+IPR=9600\r"));
			  break;
			   
			case 4:
			  _cell.begin(19200);
			  _cell.print(F("AT+IPR=9600\r"));
			  break;
			  
			case 5:
			  _cell.begin(38400);
			  _cell.print(F("AT+IPR=9600\r"));
			  break;
			  
			case 6:
			  _cell.begin(57600);
			  _cell.print(F("AT+IPR=9600\r"));
			  break;
			  
			case 7:
			  _cell.begin(115200);
			  _cell.print(F("AT+IPR=9600\r"));
			  break;
			}	
		}
		Serial.println("ERROR: SIM900 doesn't answer. Check power and serial pins in GSM.cpp");
		return 0;
	}

I tried with Arduino Pro Mini and Arduino Uno and got the same result.

Thanks a lot!