Same error, any other ideas?
C:WinAVRbin>avrdude -c usbtiny -F -p m644 -B 250 -U lfuse:w:0xe2:m -U hfuse:w:
0xd1:m -U efuse:w:0xfe:m
avrdude: initialization failed, rc=-1
avrdude: AVR device initialized and ready to accept instructions
avrdude: Device signature = 0x000000
avrdude: Yikes! Invalid device signature.
avrdude: Expected signature for ATMEGA644 is 1E 96 09
avrdude done. Thank you.