[DGmachine]

Thankyou Baba Omar Jun - you are correct.

Installed MBox2 Driver v9.0 - worked fine under Snow Leopard.

disconnected all USB devices before installing Lion.
Lion installed aok.

After install - Lion said: "some incompatible software has been put in the "Incompatible Software Folder" in root directory.
Pro Tools is not compatible with Lion."

Because i did not have PT8 installed (just the drivers) - the only files moved to the incompatible software folder were MBOX2 USB DRIVERS - 3 of them (all dated October 2010.)
I assume that Lion moved those files on the basis that Pro Tools (the program) is incompatible.
the USB device drivers are not - so install them again...

Ran the MBox2 USB Driver 9.0 again.

Plugged in the Mbox 2 - Works fine.

haven't had time to test Logic Express 9 - but I'm sure it will be fine - seems to connect to the Audio Midi Setup perfectly.

Thanks again.