Vista - Files not appearing in "Recently Changed" folder

Okay, I found the "recently changed" and "recent places" folders to be
one of the few redeeming features of Vista. But ever since my sys-
admin had to remap my network drives yesterday, files I've worked on
from the network drives don't show up in "recently changed." The
folders still appear in "recent places" but the only files in
"recently changed" are ones that are from my local machine. And since
we keep all of our documents on the shared network drive, this does me
absolutely no good.

How can I get them back? Is it some sort of indexing issue?

Thanks,
Tammy