Delta 66, Cubase5.1r1-taxing My Cpu, Help?!, perhaps an extentions issue? Options

[Zebulun James]

Once upon a time, it was all running so smoothly...

I'm reinstaling EVERYTHING and now my computer is acting up. I'm running cubase5.1r1 on my G4 with 350MHz and 896 mega bytes built-in. I'm new to having two hard drives, cubase is in the larger one, not the main one, as I intend to save all my music in there also. I instaled the delta 66 beta drivers and it seems to me this may be an extentions problem. Although I've tried eliminating different combinations and can find no cause.
When I open Cubase, and the VST performance window, it is constantly blinking red, and only plays and records, on-off-on-off, and so on.

I custom set my disk cache to 30016K and assigned more memory to Cubase in the finder. Still the same problem. Even swiching to the Apple sound manager and not the Delta ASIO, still, on-off-on-off-on-off. Awful.

So what can I do? Has anyone had something similar? Is there a particular way to configure the extentions, or settings to fix this?

That's it, thank-you to anyone who helps!
- Zeb