If the terminal displays the "No connection" message, try doing the following:
Check your Internet connection. Perhaps there are problems with communications on your ISP side.
If your computer has a stable connection to the Internet, but the terminal still says “No connection”, try to rescan the server. Left-click on the "No connection" message and select "Rescan server" from the menu item.
If none of the above steps help, in the top panel select "File" and click "Login" from the drop down menu. In the window, enter your username (trading account number), password, server address and click "Login".
If none of the above steps resolve the issue, please contact technical support.