[avr-gcc-list] at90usb1287- usb unplugging problem

[arungda]

Hi friends,
       I use STK525 kit for the development of a HID keyboard. Actually, i
has two STK525 kits. one is older one and another is recently bought one. I
had written the code such that when the code is running with usb cable
unplugged, an LED will blink to indicate that usb is unplugged  and the LED
will begin to glow when we plug in usb cable. This code works in older kit.
but when I try the same code for newer kit, it works asusual as far as other
aspects concerned. but when  I unplug the usb cable, the target board goes
to sleep mode  
            
           when I again plug in the usb cable, the microcontroller get
resetted and it works as usual.
  can somebody explains me, why the microcontroller goes to sleep mode in
the new stk525 kit when the usb is unplugged?. The version of new stk525 kit
is V.1.01.
 
 Please help me.

 thanks in advance,
 Arun.
         
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