Hello friends ,
I am new to ant tasks.in this custom ant tasks I have tried to implement, there are two classes HelloWorld.java and CmdCompile.java.

this is the build.xml I use,

<?xml version="1.0" ?>

<project name="Antcompile" default="main" basedir=".">
    <!--<description>Builds, tests, and runs the project Antcompile.</description>-->
    <import file="nbproject/build-impl.xml"/>
	<taskdef name="hello" 	 classname="just.inside.HelloWorld"/>
	<taskdef name="builder"  classname="just.inside.CmdCompile"/>

		<target name="main" >
			<hello what="miraj my son"/>
          <builder process="C:/Program Files (x86)/Windows Media Player/wmplayer.exe" />

I keep getting the error

C:\Documents and Settings\Administrator\Desktop\just\Antcompile\Antcompile\build
.xml:9: taskdef class just.inside.HelloWorld cannot be found
using the classloader AntClassLoader[]

any help appreciated. (java classes are attached)