iChat File Transfer Problem

We are running a new Wildfire server setup in house.

Our graphics business means our office environment is mixed PC’‘s and Mac’'s.

With the Mac’‘s logged into our Wildfire server through iChat, and the PC’'s using Spark, file transfer will not work.

On the Mac side it says error, and on the PC side it just times out.

Any thoughts? Is it supposed to work?

Anyone???

i tried between psi linux and ichat, it works