S2S connection problem

I have started Wildfire as easy communication with my teammates. But now I want one of my friends to connect with my server from his server (not Wildfire). But we have problem with S2S.

Wildfire returns error “Connection closed before session established” on all three ports.

His server return error “error: XML parse error (not well-formed (invalid token))”

If needed, I’'ll post additional informations…

btw: thanx to Jive Software for Wildfire and Spark - easy install, easy config, easy using - I need IRC no longer

(sorry for my poor english…)