求助高手啊 写了个build.xml 用ant实现自动编译发布 出错了

[color=#FF0000]错误提示：
Buildfile: F:\workspace\helloworldEGB\build.xml
prepare:
   [delete] Deleting directory F:\workspace\helloworldEGB\build
    [mkdir] Created dir: F:\workspace\helloworldEGB\build
compile:
    [javac] Compiling 2 source files to F:\workspace\helloworldEGB\buildBUILD FAILED
F:\workspace\helloworldEGB\build.xml:26: F:\workspace\helloworldEGB\${env.JBOSS_HOME}\client not found.Total time: 339 milliseconds

[/color]下面是build.XML文件内容，各位大虾给看看呀，不甚感激！！！！<?xml version="1.0" encoding="UTF-8" ?> <!--.表示同一目录 ..表示在上一目录--><project name="helloworldEGB" basedir=".">  
   <property name="src.dir" value="${basedir}\src"/>
   <property environment="env"/>
   <property name="jboss.home" value="${env.JBOSS_HOME}"/>
   <property name="jboss.server.config" value="default"/>
   <property name="build.dir" value="${basedir}\build"/>
    
    <path id="build.classpath">
        <fileset dir="${jboss.home}\client">
            <include name="*.jar"/>
         </fileset>
    <pathelement location="${build.dir}"/>
    </path>    <target name="prepare" >
       <delete dir="${build.dir}"/>
       <mkdir dir="${build.dir}"/>
    </target>
    <target name="compile" depends="prepare" description="编译">
    <javac srcdir="${src.dir}" destdir="${build.dir}">
       <classpath refid="build.classpath"/>
    </javac>
    </target>
      <target name="ejbjar" depends="compile" description="创建ejb发布包">
       <jar jarfile="${basedir}\${ant.project.name}.jar">
           <fileset dir="${build.dir}">
            <include name="**/*.class"/>
            </fileset>        <!--把persistence.xml打包到META-INF目录下-->         <metainf dir="${src.dir}\META-INF"></metainf>
       </jar>
    </target>    <target name="deploy" depends="ejbjar" description="ejb发布">
       <copy file="${basedir}\${ant.project.name}.jar" todir="${jboss.home}\server\${jboss.server.config}\deploy"/>
    </target>
                                                                                                                                                                               
    <target name="undeploy" description="卸载ejb">
       <delete file="${jboss.home}\server\${jboss.server.config}\deploy\${ant.project.name}.jar"/>
    </target>
                                                                                                                                                                               
   </project>