pseudo class animation :: <select> options disappear on mouseover, in ie7

pseudo class animation :: <select> options disappear on mouseover, in ie7


Hello,
I am using this script:
http://sheetup.com/menusmooth.php
When I use in my form the class in a <select>, it dows the animtion
nice on hover but as soon as I go over the <options> tehy disappear.
All this in ie7.
I am searching the web to find a solution...
If ther is one already available please let me know
Thanx!