Setting up Maximus 2.10 on my Astro City, Resolution Problem

[Ichi]

Well, I'm having trouble setting up the resolution on my Sega Astro City cabinet for Maximus Arcade 2.10.

I'm not sure what I'm doing wrong. If anyone has any idea on how to fix it please let me know.

I just uploaded a video showing the problem.

http://www.youtube.com/watch?v=DSTfKkH-06s

Maximus Arcade 2.10 Interface Options:
Interface Theme: Maximus Arcade
Resolution: 800 x 600
Bit-Depth: 32-bit
Change monitor resolution based on settings (Checked)
Convert Static Flash to Bitmap (Unchecked)
Mirror Display (Unchecked)

If you can help please let me know!

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EDIT
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I got everything working fine now. It was MAME that wasn't set up right, not Maximus.