Most of the pros use Pro Tools. Not Cubase to record with. If you are attempting to create music in Cubase and not record into it, that is likely your problem. To create electronic music, you need a sampler and sequencer, not recording software. Pro Tools and Cubase are digital audio workstations (DAW). Their primary purpose is to record, edit, enhance, and master music. But, a sampler/sequencer like the Roland SP-555 can actually create sounds and record or sample sounds and then sequence them together to make music. A Roland Keyboard synthesizer like the Roland Juno-G can also do that. If you already have recorded sounds that you can import into Cubase, then you can use it as a sampling and sequencing workstation as well. Cubase may have plug-ins that provide drum tracks and other percussion sounds you can use to import into tracks in Cubase that you can then sequence but, you need the sounds to come from recording an instrument or device or synthesizer or importing prerecorded sound tracks.
Your Cubase user manual is the best place to go to figure out how to do what you want to do. Cubase user support is another place if you can figure out the manual.
You might also want to check out some of the samplers/sequencers ...
http://www.youtube.com/watch?v=7HTQ6Nm6Z9c
http://www.youtube.com/watch?v=QSI0bS0KhTY
You might also want to see the equipment that Dub FX uses.
http://media2.roland.com/en/v/v0774/v077403M.mov