Yamaha DTXpress/DTXplorer/DTXtreme

Hi,

I am having problems with the CBX driver.  Whenever I try to use any
application that uses it I get the message that "the selected midi
device is in use".  I cannot find anything that could be using the
midi port.  It happens even without a cable connected to my serial
port.  I have tried a couple of different CBX driver versions with the
same result.

Has anyone any suggestions?

Keith.