Communication Problem with Arduino BT


i've tried to upload some example codes to my Adruino BT-V06 and at the beginning it seemed to work (i've got the "Upload Done." message without error). After i've uploaded the graph example the board seems very busy and i don't manage to upload anything anymore. The port (COM 5) i've used before is not even listed in Adruino->Tools->Serial Port anymore.

According to the device manager there are two serial connections to the Adruino BT: COM5 and COM6. When i try using COM6 the upload gets stuck and doesn't complete (see log)

Binary sketch size: 896 bytes (of a 14336 byte maximum)
C:\Program Files (x86)\Arduino\hardware/tools/avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware/tools/avr/etc/avrdude.conf -v -v -v -v -patmega168 -cstk500v1 -P\\.\COM6 -b19200 -D -Uflash:w:C:\Users\MARCOS~1\AppData\Local\Temp\build7603250299638773903.tmp\Blink.cpp.hex:i 

avrdude: Version 5.4-arduino, compiled on Oct 11 2007 at 19:12:32
         Copyright (c) 2000-2005 Brian Dean, 

         System wide configuration file is "C:\Program Files (x86)\Arduino\hardware/tools/avr/etc/avrdude.conf"

         Using Port            : \\.\COM6
         Using Programmer      : stk500v1
         Overriding Baud Rate  : 19200
avrdude: ser_open(): setting dtr
avrdude: Send: 0 [30]   [20]

An ideas?