[avrdude-dev] failed to send command to serial port

[Michael Block]

Hello,
       
is there anybody who can help me?
       
I'm using AVRDUDE 5.1 with LIBUSB 0.1.11 on a Mac OSX 10.4.4.
My programmer is a new AVR ISP MKII.
       
The commandline to burn the AVR:
  /usr/local/bin/avrdude -c stk500v2 -p m88 -P usb -v -e -U flash:w:sample.rom
       
    And here is the output:
    avrdude: Version 5.1
             Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
    
             System wide configuration file is "/usr/local/etc/avrdude.conf"
             User configuration file is "/var/root/.avrduderc"
             User configuration file does not exist or is not a regular file, 
skipping
    
           Using  Port             : usb
             Using Programmer      : avrispmkii
    avrdude: usbdev_open(): Found AVRISP mkII, serno: 0000A0000252
    avrdude: usbdev_send(): wrote 0 out of 1 bytes, err = No error
    avrdude: stk500_send_mk2(): failed to send command to serial port

Whats going wrong?

Bye,
Salty.