Clients dissappear from collection

[AF]

Running SMS 2003 w/sp2 with SQL 2000, this site is a child site under a
primary global site, running in advanced mode.

Having a problem, where my clients have dissappeared from the All System
collection. Out of 800+ clients, I have 8 showing as assigned. Where this
was about 750 before. It seems as this started happening after getting an
error on Monday that the tempdb was full. I had my DBA's take care of that
issue, but the issue has not corrected itself. Any suggestions of what I can
do to resolve this issue?

Thanks