I found the following instructions in the Palm communications forum on escribe.com:
I have now uploaded a new plugin sertransplg to my site which contains this change. You can find it again here (plugin and source):If you connect to a Sony or an Handspring device, you must use the hotsync
creator id which is: 'sync' and, in that case, you must be shure that
hotsync is not running and waiting to catch the USB communication or else
you'll get a crash as the two application will try to connect to the same
USB channel.
http://www.ghisler.com/serial.htm
Please try it! The program for the device is unchanged.