Urgent: Win2K Servers behaving oddly

Hi,

I am having a very strange issues with my Win2K servers. I have two Win2K server in a singles domain and some clients. Both servers also run SQL. Terminal services is installed in remote administration mode. All of the sudden these server are showing extremely slow. When you are on these servers directly, it could take you 5-6 minutes just to open Windows Explorer. I can access all the applications and files from the network without and delay. Also, when I use terminal services to access these servers, I have no performance issues at all. All seems fine. It is only when I am directly on the server that they are slow.

Any ideas?

Thank you.