cocoon error

[indu ss]

Hello,

I was trying to compile some java files accessing 
Cocoon  using build.xml, it gives this error

DOMWriter.java,
cannot resolve symbol:method  createElementNS
location :interface org.w3c.dom.Document

although i have w3c.jar in the classpath.
I'm using cocoon-1.8.2 & Ant 1.3 version.



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