When the Test Your System applet returns a response other than "Successful," it indicates that you have a network firewall or proxy blocking all or some of the outbound ports that the live draft uses.
This is more common in work environments, so if you're testing your system at work, we recommend trying it at home using a commercial ISP (Internet Service Provider). Additionally, if you're using any hardware or software firewalls at home (although this isn't likely), this could be an issue.
If you're testing your system at home using a commercial ISP and continue to fail to get a Successful response, please send us feedback with the name of your ISP and the contents of your Java console.
And, if all fails and you cannot get the Test Your System applet to give you a Successful response, you can still join an Autopick League, run an offline draft, or pre-rank players and have the live draft pick for you.