OK this is for future reference if anyone else has a similar issue. I wanted to fast adapt this gearbox as it was a replacement as the old one was snatching and changing gear randomly. Anyway it wouldn't let me fast adapt and the box would go in reverse and drive only and would stay in a high gear(4th I reckon), after going through all the wiring I found that dad had not plugged output sensor back in from the gearbox. Now plugged in and now I'm able to use the fast adapt. So thanks everyone its now fixed.
Pscan to the rescue again.
Cheers Chris