Not sure I understand. If I head to your site, I get the CMS - then if I click Forums, I get forums. Forums are all looking as they should.
Try editing teh vbcms_page template in teh Lightweight style and replace it's contents with:
Code:
{vb:stylevar htmldoctype}
<html xmlns="http://www.w3.org/1999/xhtml"<vb:if condition="$vboptions['enablefacebookconnect']"> xmlns:fb="http://www.facebook.com/2008/fbml"</vb:if> dir="{vb:stylevar textdirection}" lang="{vb:stylevar languagecode}">
<head>
{vb:raw headinclude}
<title><vb:if condition="$vboptions['cmstitle']">{vb:raw vboptions.cmstitle}<vb:else />{vb:raw vboptions.bbtitle}</vb:if> - {vb:raw html_title}</title>
{vb:raw headinclude_bottom}
</head>
<body style="text-align:{vb:stylevar left}">
{vb:raw header}
{vb:raw navbar}
{vb:raw toolbar}
<div class="vbcms_content">
Home page unavailable in mobile view, click <a href="forum.php">HERE</a> to view forums.
</div>
{vb:raw footer}
</body>
</html>