[dtndvm]

First, try the obvious if you haven't already...wait 1-2 minutes after the change and then soft reset. Next, try doing some other reg edit with PHM and see if it sticks. If it doesn't you may have a problem with your PHM install. You could also try another reg editor, like Total Commander.

I can't imagine a ROM could keep you from making a registry edit but it might be worth sending a PM to JD just to see if there is something in the ROM that could affect it.