Display works once then reports unknown device

[Duncan]

I have a HP laptop running Windows 7 (32bit) with an Intel 965 video chipset connected to a kensington K33367 USB dock device.
When I first installed the RC DisplayLink driver everything worked perfectly when connected to a Samsung 19" (940BW) monitor. However, after a full shutdown I can't get monitor to work. Windows reports it as a unknown device. Re-starting the DisplayLink service doesn't do anything. If I uninstall the DisplayLink driver and re-install it (with a few shutdowns in between) then it works again, but as soon as I shutdown, the issue re-appears when I next start the computer.

I have attached a zip file of the contents of the debug folder, so I hope this helps.

thanks in advance for any guidance you can provide.

Duncan.