Datalife Engine 9.6 Signature Article

Hi, I have a site with DataLife Engine v 9.6, and I have a problem with the signature.
The signature can be seen in the comments, but not in the articles.
I'm going to change the template comments.tpl and copy the code signature:

[signature]<br clear="all" /><div class="signature">------------------ Firma ------------------</div><div class="slink">{signature}</div>[/signature]

edit fullstory.tpl and insert the code above signature.

within the site, open an article, and where the signature must appear you see the code, but not the signature.

Appears [signature] </div> [/signature].

It is as if it finds the variable appears in the code and not the signature, yet in the template comments.tpl Code signing is inherent in what I wrote, and the signature can be seen without strange errors.

You know you help me? Thank you.