problem with loading

starting my program can be loaded to board. now its appear "avrdude: stk500_getsync(): not in sync: resp=0x00 avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51" can anyone please help me . thank !

Have you worked through the Troubleshooting Guide... http://www.arduino.cc/en/Guide/Troubleshooting