使用Grinder负载测试框架的问题

call \"C:\\Documents and Settings\\dkeller\\Desktop\\Grinder\\setGrinderEnv.bat\"
java -cp %CLASSPATH% net.grinder.Grinder %GRINDERPROPERTIES%

\"C:\\Documents and Settings\\dkeller\\Desktop\\Grinder>java -cp \"C:\\Documents and Settings\\dkeller\\My Documents\\grinder-3.4\"\\lib\\grinder.jar;\"C:\\Documents and Settings\\dkeller\\My Documents\\grinder-3.4\"\\lib\\grinder.jar;\"C:\\Documents and Settings\\dkeller\\My Documents\\grinder-3.4\"\\lib\\grinder.jar;\"C:\\Documents and Settings\\dkeller\\My Documents\\grinder-3.4\"\\lib\\grinder.jar; net.grinder.Grinder \"C:\\jython2.5.2\\grinder.properties\"
Exception in thread \"main\" java.lang.UnsupportedClassVersionError: net/grinder/G
rinder (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)\"

java version \"1.4.2_03\"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_03-b02)
Java HotSpot(TM) Client VM (build 1.4.2_03-b02, mixed mode)

javac 1.6.0_26