Thanks for the replies: got it working.
For some reason loading Vixen the first time to check the LE's out must have not really loaded right.
Opened a ported LOR sequence and ran it, the "adjustable Preview" would not work but the sequence ran. Added the USB DMX and the whole thing stopped working.
Quit Vixen and reloaded again, this time the ported sequence ran with the "adjustable Preview", stopped the play and added the USB DMX. Restarted the play and everything ran OK with the LE LED's are working fine.
Opened the Test Sequence and it ran fine also.
Never know what your porblem can be.