Need a Help...

Hiiii,

     OpenFire + Eclipse(Kepler)

      Having issue in build.xml file

               <taskdef name="install4j"

                classname="com.install4j.Install4JTask"

                                     classpath="${installer.install4j.home}/bin/ant.jar"/>

      taskdef class com.install4j.Install4JTask cannot be found

Thanks......