Change table color

[Triky]

Hi, I've setted a new profile field which ask for your gender. Now I would like to change a table color (in my postbit_legacy) depending by this choice.

I've tried to use this code:

<if condition="$userinfo['field20'] == '2'">class="tgender_female"<else /> class="thead"</if>

And in my additional CSS I've added this:

.tgender_female {
   background: #FFFFFF url(style/gradients/gradient_tgender_female.gif) repeat-x top left;
   bgcolor: red;
   font-color: #FFFFFF;
   font-style: bold;
   font-size: 10pt,
   font-family: verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif;
}

In my profile field I've put a Single-Selection Menu with:

Male
Female

Set Default: None.

It doesn't work. Is there something wrong? Can you help me?