If its a trial version or reverted to trial there is no mpeg support. Therefor no HDV preset.
It its a paid version, deinstall, run cleancript a couple of time and then reinstall. https://www.adobe.com/support/contact/cs4clean.html
CS5 exports to a good quality mpeg2 for dvd. Make sure Max Render Quality is on.
Premiere’s preset for HD YouTube widescreen works well.
You could consider wmvHD720p looks wonderfull.