Help trouble

[system]

Hi
please help me with a little problem
I tried to upload a mp3 shiel code to my arduino Diecimila, and after that it does not
work; the function led (13th pin) don't stop blink and when i try to upload another code the compiler shows that:

please help

[johnwasser]

Try the instructions at http://arduino.cc/en/Guide/Troubleshooting#upload