try to debug project, got "nbproject/build-impl.xml:476: nbjpdaconnect doesn't support the "listeningcp" attribute"

<target name="connect-debugger" unless="is.debugged">
        <condition property="listeningcp" value="sourcepath">
            <istrue value="${j2ee.compile.on.save}"/>
        </condition>
        <nbjpdaconnect address="${jpda.address}" host="${jpda.host}" listeningcp="${listeningcp}" name="${jpda.host}:${jpda.address}" transport="${jpda.transport}">
            <classpath>
                <path path="${debug.classpath}"/>
                <fileset dir="${build.dir}" includes="lib/*.jar"/>
            </classpath>
            <sourcepath>
                <path path="${ear.docbase.dirs}"/>
            </sourcepath>
        </nbjpdaconnect>
</target>

Product Version: NetBeans IDE 7.1 (Build 201112071828)
Java: 1.6.0_35; Java HotSpot(TM) Client VM 20.10-b01-428
System: Mac OS X version 10.7.4 running on i386; MacRoman; en_US (nb)