Help with Emulator display

I'm having a problem with my emulator, where the roms that i play would have a weird outline on it, it doesn't happen when I'm running a gba rom but when i run a DS rom the lines show up. I'd either like to know how to fix the problem, or if there's a better emulator.Right now im using NO$GBA version 2.6 running on my windows 7 x64 pc.
Below are some screen shots of the problem and the settings i'm using.http://picasaweb.google.com/landonqu/ProblemScreenshots?authkey=Gv1sRgCKaegqShnrOwwwE#5470910657266289586 -the shot of the problem
http://picasaweb.google.com/landonqu/Desktop?authkey=Gv1sRgCJfGj8fB_pHBdw#5470910740080655650 -my current settings

Make sure to use No$zoomer, as well the latest version of no$gba, 2.6a.
http://www.mediafire.com/?0tmrvozm0gm