ant's wrong office property

i'm newbie termite instead posting executive buglist(because the substantially bug), i solid post here:

when i run termite build.xml record all works good solely build directory, instead translating ability ${classes.dir} build/ver_2.0.0/classes creates record ${cv.build.dir}/classes

here biased termite code:

<!--properties-->
<property name="build.ver"   value="2.0.0"/> 
<property name="src.dir"     value="src"/>
<property name="lib.dir"     value="lib"/>
<property name="build.dir"   value="build"/>
<property name="classes.dir" value="${cv.build.dir}/classes"/>
<property name="jar.dir"     value="${cv.build.dir}/jar"/>
<property name="main-class"  value="br.uesc.computacao.estagio.controlador.controladormodoexecucao"/>
<property name="cv.dir"      value="ver_${build.ver}"/>
<property name="cv.src.dir"  value="${src.dir}/${cv.dir}"/>
<property name="cv.build.dir" value="${build.dir}/${cv.dir}"/>
...
<target name="compile">
    <mkdir dir="${classes.dir}"/>