[Newbies] Sending messages over Bluethooth "serial port"

Hi guys,

I am trying to write some code (in squeak) to talk to the Lego Mindstorms NXT. Therefore I need to communicate with a Bluetooth "serial port".

I can connect to the port using the SerialPort class (at least I don't get any message that tell otherwise), but when I try to send any message to the serial port Squeak doesn't response anymore. When I turn off Bluetooth I get an message like: "Error: a primitive has failed."

I am working on Windows XP (in case you want / need to know)

Are there people who have succesfully "talked" over the Bluetooth "serial port"?

Mispunt