help! can't undock toolbars...

I'm having an odd problem. I'd like to move one of my TLB's to the top of my screen, off the windows taskbar. when i unlock the taskbar, i can rearrange my toolbars without problems. when i try to drag a toolbar off the taskbar, the cursor changes properly, but nothing happens. i can't seem to undock toolbars at all.

the taskbar can be moved as a whole to any side of the screen without problems, also.

i'm using XP SP2, TLB 3.2.6 with a ton of plugins. no other desktop enhancements at this time.

any ideas?

thanks!!