it seems that you can't reach your QV-Server and you need to find out why.
May be you need some assitance of your network-admin.
Nevertheless, some ideas:
Did you try to get a connect entering the IP-Adress instead of the Server's Name ? Next to check: Firewall of the QV-Server or even more interresting: is your personal win-firewall working against you ? Do you have any Proxy-Server ?
Are you able to reach the QV-Server using the ping command ?
I attended a client, where every 30 days I had to ask the network administrator to unlock the doors (not sure which he released) of the server where I developed applications to rent a license on an external server because the client had not QlikView server named lime in it. Details aside, always gave this message when I tried the procedure without the release of the doors ...