I did some more digging and located the source of the issue. There are problems running in the heat map with Cisco AnyConnect VPNs. I ended up having to disable IPv6 on my VPN client to get the heat map to run.  [URL]
It seems I'm battling to get the heat map working in 6.3. I'm using firefox 18.0.1 and I've approved the java applet to run whenever I connect to the vOPS site. However every time it launches I get a page error. Looking at the java console it is telling me the following ( I have edited out the domain name):  network: Cache entry not found [url: [URL] version: null] network: Cache entry not found [url: [URL] version: null] network: Connecting [URL] with proxy=DIRECT network: Connecting [URL] with proxy=DIRECT network: Cache entry not found [url: [URL] version: null] network: Connecting [URL] with proxy=DIRECT network: Connecting [URL] with proxy=DIRECT java.lang.ClassNotFoundException: com.labescape.explorer.applet.HeatMapExplorerApplet.class           at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)           at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)           at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)           at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)           at java.lang.ClassLoader.loadClass(Unknown Source)           at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)           at sun.plugin2.applet.Plugin2Manager.initAppletAdapter(Unknown Source)           at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)           at java.lang.Thread.run(Unknown Source) basic: load: class com.labescape.explorer.applet.HeatMapExplorerApplet.class not found.
Java issues with Heatmap under vOPS 6.3?