Please add the following parameter
-Xmx1024M to the JRE Settings on the Windows machine running the thin client.
Proceed as follows:
Start -> Control Panel -> Java -> Java Tab -> Click View button.
In the User tab for the 1.7 platform, click on the Runtime Parameters field to add the following:
-Xmx1024MThen click ok, close whichever browser you were using then re-open it and try loading the webconsole again.