Linkage error

[Rahul Pathak]

Hi,
  I am trying to use the call.invoke(url,"") ...thus i would get a response
object from that..
 but at this line i am getting a Linkage Error...

  raised java.lang.LinkageError: loader constraints violated when linking
org/w3c/dom/Document class
java.lang.LinkageError: loader constraints violated when linking
org/w3c/dom/Document class
        at org.apache.soap.rpc.Call.invoke(Call.java:216)

can somebody help!!!

thanx
-rahul