Out of curiosity, do you happen to know the file name and where it is in your HTC folder? If you do, then maybe check the properties of that particular file. It seems that permissions to alter that file may need to be set.
That was just one shot in the dark sir. Much less than what you deserve, since you have whacked me out of the cartoon skies way to often.

I have a similar problem with loading skins (sometimes) and clipboard maps. I am running XP and am not familiar with the later operating systems, but just a place to start investigating if no one else offers a solution here.
I would definitely post in the Technical Support and Hardware Software forums as well. It usually gets a much more knowledgeable response than my

ponderings.

I hope you get it sorted out.