Bigjx would be the one to sort this out.

If it's a persistent problem (& looks as though it is), try downgrading to 5.6.4.2
If still issues, save your downloads.dat file & gnutella.net file & delete all other files within your WS preferences folder. Return those two files then startup WS again. You'd need to do the WS setup questions again. Looks as though you have port forwarded so you would need to re-add that port again into the port forward portion WS Listening Ports settings.

Thumbs up for sticking with Snow Leopard. So have I.