The problem is the lexicon driver. It looks like it is asleep when you open Cubase 5.
The make it work-->
1-open cubase 5
2-load your project
3-choose generic driver low-latency*****press enter
4-chosse omega asio driver ****presse enter
And you should be able to work with your omega lexicon card. *Dammed, i'm not even paid to find the solutions instead of those incompetent lexicon programmers*
You'll find the same driver issues with Audition 3 and a lot of guitar emulation software.