scanf problem

Hi, im trying to do an SMS project using AT Commands , i wanna display what the mobile sends on LCD , something like when i write the correct AT command using printf("AT\r"); it gives OK , i wanna display that OK on LCD , so i used scanf to capture the message from the mobile but it doesnt work, it freezes the display.
here is my code so far

char array[20];
lcd_com(0XC0);
lcd_puts("SMS Project");
DELAY_Second();
DELAY_Second();
DELAY_Second();
DELAY_Second();
DELAY_Second();
DELAY_Second();
lcd_com(0x01);
while(1){

 printf("AT\r");
 scanf("%s",&array);
 PC_LINK_IO_Send_String(&array);
 lcd_puts(array);


}


void lcd_puts(char *aaa){
unsigned int i=0;
for(;aaa[i]!=0;i++)lcd_data(aaa[i]);
}
}