[northlandboy]

I take it you are using automatic proxy ARP? Don't. If you must use proxy ARP - and you shouldn't but sometimes can't avoid it - then manually configure the proxy ARP entries on your firewall. Don't rely on auto proxy ARP - it's too flaky.

I take it the hide nat entries are hiding behind the firewall's IP? - in which case it doesn't need to do proxy ARP.

Take a look at the various HFA release notes - I've seen a few things where they've fixed some stuff with auto proxy ARP. Sometimes it would do things like lose the entries if the interface flapped.

Check arp -a on the server, see what it's publishing. Configure all your proxy ARP entries manually, and things should work OK.

Oh and you should probably plan on moving away from FP3/Win2K, but you probably already know that....