i download the code for encryption of xml file..
but i am getting following error..

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.apache.xml.security.Init.<clinit>(Unknown Source)
at EncryptTool.<clinit>(EncryptTool.java:51)

so, what is that? pls help me..

there is a code for xml encryption:
http://www.devx.com/xml/Article/28701/0/page/6

but, when i execute that i got error.....
so, pls anyone can tell me all the procedures to execute that program..
which jar files need to be download....

pls help me.....