Is it possible to make a searching in Z39.50 mask also by publisher?

in file z3950_search.tt I've add a:

 <li><label for="biblioitems.publishercode">Publisher: </label> <input type="text" id="biblioitems.publishercode" name="biblioitems.publishercode" value="[% biblioitems.publishercode %]" /></li>

so the z39.50 mask has a new field, but the results mask doesn't filter with it

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