Search Engine Firefox (Security Token) [Problem]

[Airon]

hello all

i'm having a problema with the security token message:

Your submission could not be processed because a security token was invalid.

If this occurred unexpectedly, please inform the administrator and describe the action you performed before you received this error.

That problem happens with the search engine that i created for firefox. On vbulletin 3.6.8 it worked fine, but now...

I tried to put it:

<input type="hidden" name="securitytoken" value="$bbuserinfo[securitytoken]" />

everywhere, including the .src file

<search
version="7.1"
name="******"
description="******"
sourceTextEncoding="0"
method="POST"
action="http://******/forum/search.php?do=process"
queryCharset="UTF-8"
searchForm="http://******/forum/search.php"
>

<input name="query" user>
<input name="do" value="process">
<input name="quicksearch" value="1">
<input name="s" value="">
<input name="showposts" value="0">
<input type="hidden" name="securitytoken" value="$bbuserinfo[securitytoken]" />

But it didnt work too, and the original forum search of vbulletin works fine.

Someone knows what can be done to fix it?

Thanks in advance.