CSS text-shadow property for ranks not working

[Invader Amoto]

I'm trying to set up my board's ranks to have a glow like effect around them in a certain color. This can be achieved by doing this in html:

PHP Code:

<font style="{text-shadow: 0.0em 0.0em 0.4em #ff0000}">Donator</font> 


But for some reason it doesn't work for ranks. The description for the rank text says that you can enter html. When I view the source of my forums, the user rank just shows up as the text "Donator" within the typical span that goes around it. The font tag isn't even there at all.
I'm using vBulletin Forum version 4.1.2 if it matters.
Does anyone know how I can make this work?

More info on text-shadow: http://www.w3.org/Style/Examples/007...shadow.en.html