SSHD Issue

[Robert Robl]

Hello everyone -

I'm running Fedora Core 1 latest everything. Previously I was getting
into this box from a Win2K station over SSH via Putty, which worked fine
until a month ago. Just the other day a friend came by with Win2K on her
laptop and was surprisingly able to get into the box also using SSH in
Putty until she got the same error I got a while back: "Software
connection reset..." 

What has gone wrong with my SSHD server? How do I find out?
/var/log/secure file? Anywhere else to look? Thanks!