Weird issue...

[BadAndy]

I've got Vista Business on my T60P and there's something getting on my nerves. When I right click a file and mouse over the "Send To" menu, it takes almost a minute for it to display the menu. I know what's causing it is the mapped work network drives that it's trying to view/access and it only happens when I'm not connected at work. Is there a way to stop the Send To menu to stop looking at network drives? I've looked at the Send To folder for my user account but the drives aren't listed there....