How to send data to sim900 only once in loop()

I am trying to communicate with a client(PC) from my arduino (set up as a server with a sim900 module connected via UART). I have successfully got it to register its IP address with a dynamic DNS provider (no-ip.com) and set up a TCP server using the AT+CIPSERVER command for the sim900. All this is done in setup(). After that in loop() it waits for a client to connect. The moment a client connects the problem arises. The code is:-

void loop()
{
  while(Serial.available() <= 0);
  int x=0;
  char server_recv_string[30];
  while(Serial.available()>0)
  {
    server_recv_string[x] =  Serial.read();
    delay(10);
  }
  Serial.println(server_recv_string);
  sendATcommand2("AT+CIPSEND",">","ERROR",1000);
  sendATcommand2("I hear you\x1A","SEND OK","ERROR",5000);
  while(Serial.available()>0)  // I dropped this in to clear out the input buffer. 
  {                            // Doesn't help
    Serial.read();
    delay(10);
  }
  Serial.flush();
} 

The sendATcommand2 is a function as given below. I don't think that has any fault in it because it seems to work fine for all the other commands in setup. However this is the code:-

int8_t sendATcommand2(char* ATcommand, char* expected_answer1, 
    char* expected_answer2, unsigned int timeout){

    uint8_t x=0,  answer=0;
    char response[100];
    unsigned long previous;

    memset(response, '\0', 100);    // Initialize the string

    delay(100);

    while( Serial.available() > 0) Serial.read();    // Clean the input buffer

    Serial.println(ATcommand);    // Send the AT command 

    x = 0;
    previous = millis();

    // this loop waits for the answer
    do{
        // if there are data in the UART input buffer, reads it and checks for the answer
        if(Serial.available() != 0 && x < 100){    
            response[x] = Serial.read();
            x++;
            // check if the desired answer 1  is in the response of the module
            if (strstr(response, expected_answer1) != NULL)    
            {
                answer = 1;
            }
            // check if the desired answer 2 is in the response of the module
            else if (strstr(response, expected_answer2) != NULL)    
            {
                answer = 2;
            }
        }
    }
    // Waits for the asnwer with time out
    while((answer == 0) && ((millis() - previous) < timeout));    

    return answer;
} 

The when I monitor it on the serial terminal I get infinite sends to my client. Its like this:

 AT+CIPSEND
 I hear you


 AT+CIPSEND
 I hear you


 AT+CIPSEND
 I hear you


 AT+CIPSEND
 I hear you

 // And on and on and on.

Any idea why this is happening? If you guys need any more information, please do tell me.

Thanks

Taz