avrdude: stk500_getsync(): not in sync: resp=0x00

Other Hardware 3rd Party Boards
1

I am using Arduino 0023 to upload Sprinter to my Sanguinololu 1.3 board, but have the following error when trying to upload to the board:
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
I am running windows vista and linking the board via a usb cable, which appears to be working fine as the LED is lit and the computer recognises it as COM3. I have tried a few things to fix it, but unfortunately having no luck. Any ideas?

2

I have also changed to 115200 bits per second in port settings

3

The chip is an Atmega644P

4

Does the chip have a bootloader installed?

5

Yes it has a bootloader that has been tested. It has a ticker on the board with bootloader, sprinter and test all ticked.
The same error appears when trying to upload sprinter and marlin firmware.
Any suggestions would really be appreciated.
Thanks

6

Does the board pass a loop-back test...
http://arduino.cc/forum/index.php/topic,73748.0.html