Do you have Ad-Watch Monitoring on? Depending on your settings, Ad-Watch could very well be restoring the settings you changed. I had that problem getting a registry key of a deleted program out of the run folder. Ad-watch kept putting it back! If this is the case, print out this post, or copy and paste them to notepad or a word program as you will be disconnected from the internet for part of this process for security reasons.
Restore the Ad-Watch window. At the bottom right of the little window, you will see a
tools button. Click on that button. Now click on the
options button at the top left. At this point, if you are still connected to the internet, please
DISCONNECT!
Below is a picture of the settings I have made to allow you to make your changes. (I have the window at full size in order to see it all. You can scroll down the sections to match the compare the various entries). If yours don't match, click on the circles by each given entry that doesn't match so they do match.

When you have done so, right click on the little icon in the system tray and click on UnLoad Ad-Watch. Now make the changes that you have been trying to make. Also, if you have any programs that automatically connect to the internet at start-up, please change those programs for now so they won't do that. Shut Down, and Restart -
Without Connecting to the Internet!
Open Ad-Watch again, click on tools, then options and change your settings so they look like the picture below. Note: These settings are for if you want to manually start Ad-Watch. If you want it to load automatically, turn the orange button - next to the option I have boxed in pink - to green by clicking on it, and Ad-Watch will load up when you start-up.

Ad-Watch should have loaded when you opened it, but double-check to make sure. You can now connect to the Internet

.
Let us know if this works,
Orange Blossom