The itemnquery does not work

[Holmand Darío Villalba Barajas]

I am doing a consultation for attributes with the itemnquery, but the
following mistake goes out for me:

msQueryByAttributes(): Query error. No query expression defined.

This is what I do:

<input type="hidden" name="item" value="CIUDAD">
<input type="hidden" name="atributo" value="nombre">
<input type="hidden" name="qlayer" value="Ciudades">
<input type="text" name="nombre" size="10">
<input type="submit" value="Consultar">
<input type="radio" name="mode" value="itemnquery">

 LAYER
    # name of layer
    NAME "Ciudades"
    GROUP "MAPAS_VECTORIALES"
    # always returned with interface
    STATUS ON
    # actual data pointer
    DATA "data/ciudades"
    # what type of data is this?
    TYPE POINT
	FILTERITEM "CIUDAD"
	FILTER "%nombre%"
    TOLERANCE 5
    #LABELITEM "CIUDAD"
    # data is queryable
    # query templates for HTML-based queries
    HEADER "templates/ciudades_query_header.html"
    TEMPLATE "templates/ciudades_query_body.html"
    # how will this data look?

someone can say to me that it(he,she) is bad.
I use mapserver 4.x

Thank you.