we found that the serialport selection (sketch > serial port) was greyed out... the conclusion was, that by using the run-expert.bat file, it was working... this was rev. 0058.
- - - -
i know much of the serial stuff is about to change with 0068, but i just thought i'd let you know, that the problem is still there with rev 0067.expert... in order to get access to the serial stuff, one HAS to use the .bat file.