Well, did I get something wrong? [solved]

FCKConfig.BodyClass = 'articlecontent';

.articlecontent { line-height: 18px; color: #535353; font-size: 14px; font-family: Arial, Tahoma; }
   .articlecontent a:link, .articlecontent a:active, .articlecontent a:visited { color: #0082bf; text-decoration: none; }
   .articlecontent a:hover { color: #da7601; text-decoration: none; }

var ContentFCK = new FCKeditor('content');
ContentFCK.BasePath = 'lib/js/fckeditor.2.6.4/';
ContentFCK.Config["CustomConfigurationsPath"] = "../../../fck.config.js"; // Path relative to FCK
ContentFCK.ReplaceTextarea();