adjusting headlight beam Options

[Coligion]

I did some searching through the forums and found this topic with some good pictures....

http://www.6gc.net/forums/index.php?showto...l=headlight+aim

However, I have turned all these screws many, many times and I can't get anything to change (vertical or horizontal). Is there something else I need to loosen up before the housings will adjust? I am only trying to adjust the low beams, but like I said, the pattern remains no matter how much I turn these screws. Thanks for the help.