problem to send sms with sonny ericsson K700i

i have a problem to send sms with sonny ericsson K700i ..
i use a data cable for sonny ericsson K700i

green color (TX)=> RX Arduino
yellow color (RX)=> TX Arduino
black color (GND)=> GND Arduino

this is my arduino code :

#include <SoftwareSerial.h>
 
SoftwareSerial Serial2(2, 3); // RX, TX pins 

void setup(){
  Serial2.begin(9600);
 Serial.begin(9600);
}

void loop() {

sendSMS() ;
 delay(5000);
}

void sendSMS(){
 Serial2.println("AT");
         delay(3000);
       Serial2.println("AT+CMGF=0"); // Set PDU mode
  delay(3000);
 
   Serial2.println("AT+CMGS=23"); 
   delay(3000);
   Serial2.print("0011000891122219730000AA0CC8F71D14969741F977FD07"); // send "  How are you ? "  to "  21239137 "
   delay(3000);
   Serial2.write(26); //ctr+Z
   delay(3000);
   Serial.println("send!");
   
   
}

( PS: AT commands work very well on hyperterminal)

.....

You should explain your problem much more clearly, my best suggestion is to try to figure out what is happening, so grab a scope and get to work!

I assume by your hyperterminal comment, that you were able to send using a computer.