only line-height argument doesnt match

[Rolf Brauser]

Hi,

I attached leftcustomnav at a link
<a href="#" class="leftcust omnav">Gesch&au ml;ftsbereiche</a>
a.leftcustomnav { color: #333333; line-height: 20px; text-decoration: none;
font-family: Arial, Helvetica, sans-serif; font-size: 11px}
a.leftcustomnav :hover { color: #999999; line-height: 20px; text-decoration:
none; font-family: Arial, Helvetica, sans-serif; font-size: 11px}
a.leftcustomnav :visited { color: #333333; line-height: 20px;
text-decoration: none; font-family: Arial, Helvetica, sans-serif; font-size:
11px}

Éverything ist linked , the colors, the font, the text decoration, I only
lack the line height argument which doesnt match.
The syntax should be ok - what can be the reason ?

thanks for any help
ROLF