This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I've not done this through the admin console but the error seems to tell you what is going on - the machine on which you're running the browser to access the admin console must be on the "allowed" list too. If it is all on the same machine it might be 127.0.0.1 or the primary IP address of your machine.
<a href="http://forums.hotjoe.com/forums/list.page" target="_blank" rel="nofollow">Java forums using Java software</a> - Come and help get them started.