I tried it with the firewall disabled on both server and client but that made no difference.
Yes, I can play the recorded file on any pc on the network using VLC.
i still think it might be a firewall issue.
when i was having problems with multiseat i used this to find out if mediaportal was causing the trouble.
MP TV Client - MediaPortal Forum
install it and try. see also if you get an OK in the ports
Spain