well, won is Valve's old way of doing their servers. They checked your CD-Key and all that nice junk.
They've recently upgraded to steam, which if you haven't manually upgraded to it yet, then you don't have it.
I'm not sure if people who still use won can join servers running steam or vice versa, but I do know that
http://www.gametiger.net/search?game=all&mod=esf is a good link to find servers to join. You can copy and paste the ip
ort into the addserver box.
You mention that none of the servers work... are you getting a specific message, and do you have everything updated as high as possible?