独立运行Apache FtpServer 1.0.0启动时报错

本机已安装JRE 1.4.2_19-b04，通过独立运行的方式启动Apache FtpServer 1.0.0时报错。

D:\apache-ftpserver-1.0.0>bin\ftpd.bat res\conf\ftpd-typical.xml

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/ftpserver/main/CommandLine (Unsupported major.minor version 49.0)

        at java.lang.ClassLoader.defineClass0(Native Method)

        at java.lang.ClassLoader.defineClass(Unknown Source)

        at java.security.SecureClassLoader.defineClass(Unknown Source)

        at java.net.URLClassLoader.defineClass(Unknown Source)

        at java.net.URLClassLoader.access$100(Unknown Source)

        at java.net.URLClassLoader$1.run(Unknown Source)

        at java.security.AccessController.doPrivileged(Native Method)

        at java.net.URLClassLoader.findClass(Unknown Source)

        at java.lang.ClassLoader.loadClass(Unknown Source)

        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

        at java.lang.ClassLoader.loadClass(Unknown Source)

        at java.lang.ClassLoader.loadClassInternal(Unknown Source)

出现以上错误，请检查MANIFEST.MF的JDK/JRE的版本信息。

ftpserver-1.0.0.zip

         \apache-ftpserver-1.0.0\common\lib\ftpserver-core-1.0.0.jar

                   \META-INF\MANIFEST.MF

                            Build-Jdk: 1.6.0_10