definately a resource issue...had a similar issue a while back, and cured it some by using a small app, which runs in the background, and refreshes your pc memory, every few minutes (you can set in to automatically reclaim system memory or right click in the taskbar and and make it do it manually) Think its called ram idle... Also try disabling some tasks, from the control panel, if youre using XP. Hope this helps...

"If toast
always lands butter-side down, and cats always land on their feet, what
happens if you strap toast on the back of a cat and drop it?"

Steven Wright