Entering Video Bitrate Makes Preset Switch To SVCD

[akulier]

Strange thing:

When I try to convert a Avi/DivX into a DVD, after preselecting "DVD" the video bitrate is preset to 4000, and shows in green. When I press Best, a new rate is calculated (e.g. 2700), again in green. When I then change it back to a higher rate using the RATE button, it shows in blue, and the preset in the summary autmatically switches to SVCD!!!!!

So, what do I do to get the best possible quality of a movie, using the full space of a DVD4, without having the thing select SVCD by itself?

To clarify:
when I enter the bitrate MANUALLY, it does NOT switch to SVCD, but when I hit the RATE button, the automatic switch happens.

thx for your help

Alexander

[akulier]

Just realized I posted this in both forums. Sorry about that.
A