Help!!!...

The problem happens either when I'm using my firewire soundcard, or when I'm coming out of the jack on lappy, but it's much worse for the soundcard.
It gets much worse as more instruments come in, particularly it seems when there's audio files instead of midi, or when loud bass comes in.
I've only got about 20 virtual synths on the go and a couple of audio tracks, all with FX, but last week I was doing this on SX3 with about 60 virtual synths, and audio tracks, sending out toa mixer and recording back in at the same time, something must have changed.

I've had a fiddle with a few things on the asioall program, the thing is, when I fiddle with that, I can't notice anything on cubase, but I seem to be able to do all of these things that it does on cubase anyway.
I also got this PCI latency download thing and did what the soundcard people said to do and that hasn't helped (prioritise the soundcard over other things that use PCI (or something like that))
there's a few options on the VST system link which seem to change things slightly but I dunno much about them so don't wana just be clicking randomly.

My laptop is dual core so it says, 2GHz using 3.24GB of RAM, altho I put 4 in! cheeky!
don't know the speed of the ram.

If you've got any other suggestions that'd be great, otherwise I'm giving up and reinstalling SX3, 5 just seems to be annoying, loads of the useful hotkeys have changed and it doesn't do things how I like, and everything, including exporting an audio mixdown is about 5 times slower, with the only advantages of some quite cool plugins as standard, but they're easily obtained anyway...

good call man, after a day of being annoyed at doing something which is usually a stress relief/chill out activity, cubase 5 can I need to clean my mouth out with soap and water off!!!

cheers for your help anyway

where did that come from!?