I'm using Kaspersky Internet Security 2011 and that was the clue I needed. I opened up the settings configuration and tried adding the ISY's address as trusted to various components of the antivirus/firewall software, including the firewall itself. The first few components I tried adding the address to didn't work. However, when I added the address to the Web Antivirus trusted URL's, the problem resolved and I was able to full access the ISY with my Antivirus/Firewall reenabled. Thanks.