Secure Lockdown IE Edition and deep freeze

I am trying to run Secure Lockdown and Deep Freeze on a PC.  I can install both successfully, and deep freeze will work as intended unless I enable Lockdown.  When I apply lockdown and restart the machine, I can no longer access my Deep Freeze console to enable Deep Freeze. The Deep Freeze console is accessed by pressing Ctrl+Alt+Shift+F6.

I have "No System Keys" UNchecked.
I added the file path for deep freeze .exe to the background apps in Lockdown.

Even with these settings I cannot access Deep Freeze console.

Just in case your not familiar with Deep Freeze, its a program that freezes the HD in its current state, and any changes made to the system are reverted back after a restart.

I have these two programs working on other Kiosks at our properties, but for some reason I have trouble with this machine, and one other, and they are both running the IE edition of Secure Lockdown.

The normal steps I take are:

1. Enable Secure Lockdown and restart
2. After loading into windows, I open up deep freeze console and freeze the machine in its locked down state.

After this the machines are frozen in a locked down state.  

In this case I cannot access the deep freeze console to lock the HD.

Any ideas, am I missing some setting somewhere?

What Windows OS are you using and is it 32bit or 64bit? What build of Secure Lockdown are you using (found in the Help > About tab)?)

It's currently unclear why Secure Lockdown is blocking the Ctrl+Alt+Shift+F6 key sequence, but you can remove all blocked  keystrokes. Please review the "Disable Block System Keys" option in the Secure Lockdown Administrator Guide > Hidden Features section to learn how to fully disable key blocking. Also, be sure that the System Lockdown > Local Level > No Desktop option is disabled. Otherwise the Deep Freeze utility won't run.

Its working now, adding the registry key "DisableBlockKeys=1" I am able to access the Deep Freeze Console.

FYI, I am running Lockdown Version 2.0(IE Edition) Build 2.00.131

Thank you for the help.