How is your network managed? I have had a problem with a managed data switch that I didn't know, and when I blew new firmware it worked just fine! I think the problem is either within your network, or it may be that you have another software Firewall that does not allow MagicInfo pro to connect with the Client.
Network issues are hard to offer advise on, the problem is that everyone's different.
If that does not work, then use the MagicInfo pro server as a static IP address, and then configure the client as appropriate. That will create a tunnel through your network and see if you can connect.
Bill