Great. So the fonts are installed. If you are running ASIO, remember that it's one-program-at-a-time (so don't choose ASIO with BiaB if you've got Cubase running.
Anyway, best suggestion is to run Band-in-a-Box, and explore the various styles etc. Likely RealBand is having ASIO problems with your interface, or the fact that Cubase is/has been run also with ASIO. So forget about RealBand.
The installation is done, and it looks like you've got everything installed. As mentioned above, increase the tempo to 140 (from 130) on that demo if you want to avoid the artifacts that are sometimes created by tempo stretching to lower tempos.