Xfree Modelines

I have a problem with high pitch noise coming from my laptop monitor only under Linux and not under Windows. I suspect is something to do with the refresh rate, so I took the exact values used in Windows and used a modeline generator to generate the correct modeline. The thing is that if I check the Xfree log, it still uses another modeline and not the one I tell it to use. Here are my config and log files: http://nemesis.ee.teiath.gr/~ee3240/XF86Config http://nemesis.ee.teiath.gr/~ee3240/XFree86.0.log If you can take a look and tell what might be wrong. Thanks