am getting this error Exception in thread "main" java.lang.NoClassDefFoundError:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/ht
tpclient/HttpException
        at org.apache.xmlrpc.client.XmlRpcCommonsTransportFactory.getTransport(X
mlRpcCommonsTransportFactory.java:38)
        at org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorke
r.java:56)
        at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:167)
        at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:158)
        at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:147)
        at JavaClient.main(JavaClient.java:42)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.httpclient.HttpE
xception
        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)
        ... 6 more
 
 
However the sever is runing well

 
I use XML-RPC 3.1.2



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