avrdude error: select device

Hallo,

Ich möchte AT90CAN128 über USB2RS232-Schnittstelle programmieren. Die 
Software AVR Eclipse habe ich benutzt.

Während Upload habe ich das Problem getroffen:

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avrdude: error: programmer did not respond to command: select device
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Unter "AVR Target Hardware " habe ich schone AT90CAN128 mit 16000000 
ausgewählt.


Kann jm. vielleicht sagen, was bedeutet der Fehler?


Vielen Dank im Voraus!