Yootools Reflection in joomla! Login

[StefanTwigt]

Hi, I'm trying to use the yootools reflection on the image in the default joomla! login layout (component).
I traced a .php file in components/com_user/views/login, view.html.php.
In this file the html code for the image is created.
Basically, to create the yootools reflection, all you have to do is add the class "reflect" to the image, and of course make sure that the yootools are loaded.

In the view.html.php file I can edit the code so it adds the class="reflect", I also can see this code in the resulting webpage, however, there is no reflection there.
Yootools must be loaded, because they are also on other pages....so what's making this so hard?

best regards!

p.s.
using joomla! 1.5.18 on php 5.2