Hello, i experience a few times an hour a behaviour of ULINK (Driver from PK166-Package V5.05) when changing to DEBUG mode (on a XC167-system; PC is WinXP Pro SP2 based). Then the system "hangs"...when disconnecting the USB cable to ULINK an error message "Can't read ULINK serial number" or "No ULINK device found" appears. After ack'ing the messages and reconnect the ULINK to USB normal DEBUG startup is successful. Has someone else experienced the problem? thanks, Roman