Thanks. I appreciate that info.
Here's we I am currently with my RB problem:

Under the advice of another PG Music rep. who assured me the problem was my audio drivers, I once again did an uninstall/install of my Line 6 UX2 Drivers, shut down RB and restarted my comp, opened RB and tried to play a tune—same problems. After about one hour, I tried it again and everything worked fine. Can’t really explain that and I guess I shouldn’t try.
Thanks again to all. Deeply appreciate your help.
RA