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

Hi

Diecimila with Atmega 168 and i select "Diecimila or duemilanove w/ Atmega 168". I tried in other computer and the same error.

When i disconnect and reconnect the arduino to pc the led ( led associated to pin 13 ) dont blink, only power led is on ( green led ). The bootloader is failing maybe?

I connected arduino to usb in pc. Everything worked fine until today... i was working with VRbot and arduino.

I read the guide anted to ask in forum.

Thanks

EDIT:Ah, I tried too with arduino 0019, and the error is:

avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51