problem uploading to board....

i`m new here... i have problem to uploading coding to board.. the message show:

Binary sketch size: 1026 bytes (of a 32256 byte maximum) avrdude: stk500_getsync(): not in sync: resp=0x30 avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

can some1 help me to solve my problem???

Which model arduino? Which OS?