If you're behind proxy: Go to "Preferences->Options->Connection" in the iMesh Toolbar and enter your proxy address (if address is too big, enter proxys IP address. To check your proxy IP address, go to "Start->Run" in Windows, write "command" and press OK. Then write: "ping 'your proxy address " in the opened window. The IP address is a number in the format xxx.xxx.xxx.xxx)