Final Cut express rendering problem

Hello,

I'm creating a QuickTime file on Final Cut to be used as a background in iDVD. I'm importing graphics/text from Adobe Photoshop and when I look at it unrendered, it looks perfect.

However, as soon as I render it (and the subsequent output), there seems to be horrible aliasing.

I've tried to adjust the Render Control Tab, but I don't even know if my version has one (Final Cut Express 1.0, talk about old school!)

Please help!