AX500 not receiving commands from MBED

#include \"mbed.h\"

Serial pc(USBTX, USBRX);
Serial ax500(p9,p10);
DigitalOut led1(LED1);
int i;
int main() {
    ax500.baud(9600);
    ax500.format(7,Serial::Even,1);
    
    for(i=0;i<10;i++) { // Carriage Return \'10\' times
   ax500.putc(0x0D);
    }
    
    while(1) {
            ax500.putc(\'!\');
            ax500.putc(\'B\');
            ax500.putc(\'5\');
            ax500.putc(\'0\');
            ax500.putc(0x0D);
          
             
            pc.putc(\'!\');
            pc.putc(\'a\');
            pc.putc(\'5\');
            pc.putc(\'0\');
            pc.putc(\'\\r\');
            pc.putc(\'\\n\');
            
            led1 = !led1;
    }
}