2010 Quick drive disabled

[old-Hammo]

I seem to have lost the ability to go into the driver sessions. I created a test loop with on loco and clicking on quick drive goes into loading something and then returns to the surveyor mode. The session creation box has nothing in it and if I add Driver Setup, it appears but there are no edit buttons to do anything with it. The York-London route runs ok but no DCC control appears.
Anyone have any idea what might cause this?
Thanks
Arthur

 

[fran1]

Upgraded to SP2 ?

 

[old-Hammo]

Upgraded to SP2 ?

Thanks for reply. No, I don't think I have, but the drive function was working since I installed it in February.

 

[old-Hammo]

Fixed

In the end I re-installed EE 2010 and copied back the local and assets directory and all is fixed.
Ta