Error in integrating SOAP

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Newsgroups gmane.comp.mozilla.devel.java
Organization http://groups.google.com
Message-ID <[email protected]> 
Hello techie !
  I have integrated WEBSERVICES from www.xmethods.net for currency
calculator.
 I have already imported

axis.jar
axis-ant.jar
soap.jar
xerces.jar
 while compiling the application , I am getting ERROR

java.lang.VerifyError: (class:
org/apache/soap/util/xml/XercesParserLiaison, method: read signature:
(Ljava/lang/String;Ljava/io/Reader;)Lorg/w3c/dom/Document;)
Incompatible object argument for function call

please suggest a solution.
  regards SAURABH
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