Can't change height of thumb

[hl90]

Hi if I go to my "files & thumbnails settings" I can only change the width of my thumbnails
and not the height. I get everythime a 140 pixel height thumb if I fixed the "Update thumbs and/or resized photos"
at my admin tools. I can only choose "Maximum size of a thumbnail". I hope someone can help me.
Sorry for my bad English.

[hl90]

And does someone know how to make a sharper thumbnail? Example: http://oh-lily.com/gallery
Sorry for posting twice I couln't edit the previous post.

[Stramm]

Make sure you use one of the supported languages (compare the announcement thread - http://forum.coppermine-gallery.net/index.php/topic,28367.0.html ) to do the settings