Does the client give any messages? Does the webadmin work? Can you ping the machine where the server is running on?
The HTTPS warning is because you don't have a certififate for the webadmin. This isn't a problem, it just means the webadmin is running in HTTP mode instead of HTTPS.
The HTTPS warning is because you don't have a certififate for the webadmin. This isn't a problem, it just means the webadmin is running in HTTP mode instead of HTTPS.