Ok this will apply for all distro not only ubuntu.
In the office we are on proxy.i tried the following

ME : SEND FILES OTHERS
Kopete TO Pandion (windows) = not working
PSI TO Pandion (windows) = not working

i havent tried psi (linux) to psi (windows) yet. cuz nobody uses psi in the office
what causes this ? is there a fix for it.