Uploading Media to DML1200

Hi,
I have some DML1200's and I'm having trouble connecting to them via the Barco EMPManager to upload additional media content.

I can communicate and control the fixtures from Barco Projector Toolset.

I can VNC to the onboard media server (allowing me to see the output of the media server) which suggests the network communication is ok, but whenever I open EMPManager it looks as if no connection to the units exists.

I have tried using static IP addresses, and also DHCP assigned (with a router on the network)

Any tips?

Cheers

Steve.