Are you using IE, Firefox, or Chrome? I know with Firefox, there was a change around version 15 that made the KVM sessions stop launching correctly.
Hello Dan, I've been trying IE10, FF22 and heard, that Chrome doesn't work.
A litte step, I made towards a solution is, instead left clicking APPLY in FF22, using the context menu, actual Frame => using only this Frame and the APPLY. This doesn't work wit IE. The next Problem is the mouse control. Relative mouse movement is crap, and absolute doesn't work on Linux machines.
I hope, Intel will recognize and solve this Problem, soon!
Did your browser download a file named KvmViewer_xxxx.jhlp? Sometimes the browser just download and save a file in default location without prompt. If that's the case, double click that file to establish KVM session.
As for the mouse control, change mouse mode to Relative after the KVM session starts.