In archive, meta description and keywords are empty ?

[Mean]

In archive/index.php

$metatags = "<meta name=\"keywords\" content=\"$threadinfo[title], " . $vbulletin->options['keywords'] . "\" />
<meta name=\"description\" content=\"[$vbphrase[archive]] " . ($p > 1 ? construct_phrase($vbphrase['page_x'], $p) . " " : "") . "$threadinfo[title] $foruminfo[title_clean]\" />
";

But something is wrong and why are they empty ?

For example:
http://www.forumistan.net/archive/allah-u-tealanin-varliginin-ispati-t4946.html

<meta name="keywords" content="" />
<meta name="description" content="" />

How can I fix this ?

--------------- Added 1200835339 at 1200835339 ---------------

Please can you help me ?...

[Mean]

Where Can I edit archive template ??

[Lynne]

There is no archive template. The page is at archive/index.php . When I look at my archives, it has the same keywords and description as my main site, so I'm not sure what is up with yours - maybe you need to reupload it.

[Mean]

Thanks for the reply, so the meta tags are there in your archive ?

[Lynne]

Yes, they are there in my archive.

[Mean]

I Found that, if I disable Zoints SEO 2.2.2 plugin, everything is fine...

Why zseo remove those metas, I cant understand.