Fixed height in text box

Hi Kriesi!
Have have search high and low to find out how to make the right class + quick css for a textbox.
I want to have the same height for the boxes so the buttons below the boxes are in line (otherwise they “jump” depending on the text length.)

I have:
– turned on http://kriesi.at/documentation/enfold/turn-on-custom-css-field-for-all-alb-elements/
– added a class in textbox (called it elements)

added this to quick css area:

#top .elements{
height: 100px !important;
min-height: 100px !important;
margin: 0 !important;
padding: 0 !important;
}

But for some reason nothing changes. Are working in the latest version of enfold and WP. No plugins added…

What am I doing wrong??
Please help! :-)