problem with reading sms (gsm module sim300cz)in the other times

hi every body
i want to receive sms with module gsm sim300cz & then i read the sms and then for example i want to forward the text of sms to a number , at the first i can read the text & forward it but for the second time when i send sms until to read text it can not work, i try to solve this problem but i can not , i read most of the post, but i can not plz help me i am very unhappy,i put my code of my program ,please read it & tell me why it didnt work for the other times when i send a sms it can not read it?
#include "AT91SAM7x256.h"
#include "lib_AT91SAM7x256.h"
#include "delay.h"
#include "usart.h"
//#include "string.h"
#include "PIO.h"
#include "adc.h"
#include "lcd8bit.h"
#include <stdio.h>
void sms_send(void);
void delete(void);


int main(void){

unsigned char sms[250];
int k=0;
int i=0;
int j=0;

unsigned char b;
char Enter=13;
char Ctrlz=26;
char double_quote=34;

/*configuration lcd*/
lcd_rs(2,0x1);
lcd_e(2,0x2);
lcd_data(2,0x3fc);
lcd_clear();

/*configuration usart*/
USART(18432000,9600,0);
usart0_init();

/*configuration ADC*/
config_adc(0xff);


/*configuration pio*/
PORTA_OUTPUT=PA5;
PORTA_INPUT=PA29;

for(k=0;k<250;k++)
{
sms[k]=0;
}

printf("AT%c\n",Enter);
delay_ms(50);
printf("ATE0%c\n",Enter);
delay_ms(50);
printf("AT+CMGF=1%c\n",Enter);
delay_ms(50);
printf("AT+CPMS=%cME%c%c\n",double_quote,double_quote,Enter);

delay_ms(50);

delete();

while(1){
for(k=0;k<250;k++)
{
sms[k]=0;
}
printf("AT+CNMI=1,2,0,0,0%c\n",Enter);
delay_ms(50);

if(PINA(29)==0) /*CONDITION*/
{
printf("AT+CMGR=1%c\n",Enter);
while(j==0) {


b=getkey();

switch(b)
{


case 10:
if((sms[0]!=0)) {
j=1; }
break;

case 13:
if ((sms[0]!=0))
{
j=1;}
break;

default:
sms=b;
i++;


} /*END switch 1*/
} /*END while j=0 */

sms_send();
printf("%s%c",sms,Ctrlz);
SET_PORTA=PA5;
delay_ms(500);
RST_PORTA=PA5;
delay_ms(500);
SET_PORTA=PA5;
delay_ms(500);
RST_PORTA=PA5;
delay_ms(500);
j=0;


}
}
}



void sms_send(void)
{
char En=13;
char doubles=34;

/*read input data*/
printf("at%c",En);
delay_ms(500);
printf("AT+CMGF=1%c",En);
delay_ms(500);
printf("at+cmgs=%c09192484603%c%c",doubles,doubles,En);
delay_ms(100);

}

void delete(void)
{
char Ent=13;


printf("at%c",Ent);
delay_ms(500);
printf("AT+CMGD=1%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=2%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=3%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=4%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=5%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=6%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=7%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=8%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=9%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=10%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=11%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=12%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=13%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=14%c\n",Ent);
delay_ms(500);
printf("AT+CMGD=15%c\n",Ent);
delay_s(2);
}

Hi friend,
i had few doubts, may i know which controler you are using to intrerface modem and how you are sending the commands to t6he UART of SIMCOM.
just using printf?

hi
i work with micro arm(at91sam7x256)
yes , i used command printf
i test my program & it works but the problem of my program is when i send sms for the first time my program can read the sms but when i again send an sms it,my program can not read it?
do you have any idea why it happen?
& do you have any program about readin sms until i undesrstand what i do wrong?
thanks
i am waiting your help ,plz help me

Hi friend,
Try by changing the delete() routine after the AT+CMGR=1 routine, it may work..

hi
thanks,i do it but it didnt work...
what i do?

have you checked the status of the modem in hyperterminal manually with the same sequence as your program does.

no, i cannot communicate with my hypertermianl, it didnt work, i test port com my computer but it didnt work.

change the tx and rx connection of serial cable on one end and try... what is the power supply you are using for testing?????????????

void sms_send(void)
{
char En=13;
char doubles=34;

/*read input data*/
printf("at%c",En);
delay_ms(500);
printf("AT+CMGF=1%c",En);
delay_ms(500);
printf("at+cmgs=%c09192484603%c%c",doubles,doubles ,En);
delay_ms(100);

}


your output will be "09192484603"" it should be like "09192484603" this it can like this also printf("AT+CMGS=\"09192484603\"\r\n"); na?

send this AT command after initialization AT+CNMI=2,2,2,0,0 so that you no need to read from sim card try this have a nice day