Illustrator +brush +wacom = crash

I'm having a real trouble when using illustrator CS, that is that it crashes after about 3min that I start using brush tool.

I use wacom's graphire 3 with the latest drivers and tried it without the drivers too but it was still the same. In illustrator 10 I had the same issue, so I really don't know what to do.

If I draw with a pen or draw shapes and anything else it's all fine, photoshop CS works good as well, but I'm using brush 'cause I'm drawing sketches and illustrations and need a more dynamic feel than the pen.

If anyone had any similar issues and found any solutions, please tell, or any advice will be good too.