GSM Modem Problem

Hi Friend, I have completed message sending part using ARM7 and SIMCOM GSM/GPRS m22 Modem, also able to receive message using UART Interrupt.
My problem is that my received response and data is not getting stored in any buffer variable.
Please if anybody can help me out....thanx in advance....

Please paste your program here for checking..

Hi Ajay, Thanx 4 ur quick, response...as my code is too large i am sending youn in short only ISR and main......please go through it.....also i am using 2 serial port
COM1 is connected between computer and LPC2148 to see response @ terminal
COM2 is connected between GSM modem and LPC2148
In short I am using both the COM Port of ARM7(LPC2148)

//=================================================
// UART1 ISR 
//=================================================
void uart1ISR (void) __attribute__ ((interrupt ("IRQ")))
{
	uint32 u32Temp ,tempcounter=0;

	while((u32Temp = U1IIR & 0x0f) != UART1_NO_INTERRUPT)
	{
		if (u32Temp == UART1_RLS_INTERRUPT)
		{
			// read U0LSR to reset the interrupt
			u32Temp = U1LSR ;
		}
		else if ((u32Temp == UART1_RDA_INTERRUPT) ||     (u32Temp == UART1_CTI_INTERRUPT))
		{
			while(U1LSR & 0x01)
			{
				UART_u8SerBuffer[UART_u32SerWrPtr] = U1RBR ;
				//==================================================
		        ////////////putchar1(UART_u8SerBuffer[UART_u32SerWrPtr]);
		        //putchar0(UART_u8SerBuffer[UART_u32SerWrPtr]);
		        mybuffer[tempcounter]=UART_u8SerBuffer[UART_u32SerWrPtr];
		        
		        UART_u32SerWrPtr++ ;
		        tempcounter++;
		        mybuffer[tempcounter]='\0';
		        
				
				//UART_u8SerBuffer[UART_u32SerWrPtr] = '\0';
				
		        //==================================================
				
				u32Temp = MAX_BUF_LEN ;
				if (UART_u32SerWrPtr >
= u32Temp)
					UART_u32SerWrPtr = 0 ;
			}
		}
		else if (u32Temp == UART1_THRE_INTERRUPT) 
		{
			if(U1LSR & 0x20)	// is this condition necessary???
			{
				UART_u32MyTi = 1 ;
			}
		}
	}

	ISR_DONE();
}

int main (void)
{   
    /*-------------UART0 Interrupt not required-----------*/
    /*                                                                               */
   /*   setupISR(1,UART0_INT,uart0ISR,IRQ_SEL);     */
    /*                                                                               */
    /*-----------------------------------------------------------*/
      setupISR(0,UART1_INT,uart1ISR,IRQ_SEL) ;    
      All_UART_Init();
      GSM_Init();
      puts1("ATE0");                //Echo off
      putchar1(CR);
      puts1("AT+CMGF=0");   //set echo off
      putchar1(CR);             
     
      puts0(UART_u8SerBuffer);  //read response and set buffer counter zero
      UART_u32SerWrPtr=0;
    
      puts1("AT+CMGR=1");        //read message at index = 1
      putchar1(CR);
     
      puts0(UART_u8SerBuffer);  //display message
      UART_u32SerWrPtr=0;
   
      return 0;
}

okay...i have solved it....thanks.