On Tue, Aug 10, 2010 at 10:07:47PM +1000, Graeme Gill wrote: > If you were to run some sort of USB trace on the software that does work I couldn't get any log with Snooppro on the device at WinXP. I have at work an access to Beagle 480 USB sniffer and tried with that. I launched the HP calibrator program which said Eye One was not connected. I started recording and plugged the Eye One and waited for HP softwere to detected it and stopped recording. The log is available at http://piipiip.net/~jlavi/USB/calibraration.tdc Too bad Data Center program does not allow sawing it as text file, but the program is available available for Linux at http://www.totalphase.com/download/zip/data-center-linux-v4.20.zip The event index 270 is control transfer: 42 05 00 4C 5F 43 4B 00 or "B..LOCK" Could this be the unlock string? Jarko Lavinen