Correct OpenSearch description

[TiKu]

Hi,

I'm trying to create an OpenSearch description XML document for a vBulletin forum and could need some help.
So far my document looks like this:

<?xml version="1.0" encoding="UTF-8" ?>
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
        <ShortName>My Forum</ShortName>
        <Description>Durchsucht alle Inhalte meines Forums</Description>
        <Url xmlns:parameters="http://a9.com/-/spec/opensearch/extensions/parameters/1.0/"
             type="text/html"
             template="http://myurl/vbulletin/search.php?do=process"
             parameters:method="POST"
             parameters:enctype="application/x-www-form-urlencoded">
                <parameters:Parameter name="do" value="process"/>
                <parameters:Parameter name="query" value="{searchTerms}"/>
        </Url>
</OpenSearchDescription>

Together with the corresponding meta tag in the headinclude template, this makes the forum search appear in Firefox search bar. However, searching is not really working. It always forwards to the extended search page and tells me that the number of results would have been too large (which is a lie). I guess it has to do with the missing securitytoken parameter, but this is just a wild guess.

So is there anybody who already has done this and can help me on fixing the OpenSearch description?

Regards
TiKu