What's up with this?

My folding clilent on my P4 2.4 has said this message all day yesterday and today... (the client on my Celeron 2.0 server is running fine)
(I haven't had it running for a while, but I haven't made any changes to it either)
Any ideas on how to correct this?
I'm running client version 3.24
Thanks,
Gabe