16/9 anamorphic DVD pulses dim and bright

Making of DVD with 16/9 anamorphic:
-Mini DV video shot with DVC 30 Panasonic in 16/9 anamorphic.
-Edited in Final Cut Express 3.0 (running Tiger 10.4.6 on a single 1.8 G5).
-Exported in Quicktime (7.04) as a reference movie.
-Dragged resulting Final Cut Express Movie File onto Anamorphicizer.
-Imported resulting QT reference movie .mov file into iDVD.
-Chose 16/9 theme, burned to DVD.
-On playing the DVD, I noticed that the light pulses dim and bright. I didn't see that with the video in FCE.
Any ideas?
Thanks, Fred

The pulsing light comes from my computer playing the DVD. On a DVD player, it is perfect (as long as I set the mode correctly). Actually, both attempts create playable DVD's:
FIRST:
-Mini DV video shot with DVC 30 Panasonic in 16/9 anamorphic.
-Edited in Final Cut Express 3.0 (running Tiger 10.4.6 on a single 1.8 G5).
-Exported in Quicktime (7.04) as a reference movie.
-Dragged resulting Final Cut Express Movie File onto Anamorphicizer.
-Imported resulting QT reference movie .mov file into iDVD.
-Chose 16/9 theme, burned to DVD.
SECOND:
-Exported to QT conversion, using QT Pro and Apple Intermendiate Codec. Set 1920x1080 size. Result is wonderfull quality, and very big file size 9+ GB. Used iDVD (16/9) with this file, and it fit on a DVD disk.
So both methods work, although the quality seems better on the second. So it is when I play the DVD back on my computer that the pulsing occurs (aspect ration fine). I have tried changing the deinterlase on DVD player, but I don't see too many other settings to change.
The important thing is that the burned DVD's do play fine on a DVD player (aspect right, no pulsing light). Thanks for everyone's help on this.

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