Follow these steps:
  1. Right click the Citrix icon in the icon tray.
  2. Select Connection Center from the context menu.
  3. Select the application server from the list of connections.
  4. Click Log off
  5. Repeat steps 3 and 4 for any and all remaining connections.
NOTE: Please ensure that all exceptions have been made in the firewall and any Web Filtering programs are not blocking the connection.