KonaKart 3.2.0.0 : Content Type Issue

[gtrivedi]

I have installed KK 3.2.0.0. I am using Oracle as DB. After installation I am able to load konakart website. I.e. http://localhost:8780/konakart/
but I am not able to load admin. I.e. http://localhost:8780/konakartadmin/
It asks me to see the log.. When I saw the log it gives this error... Please help me out on this..

Aug 20, 2009 11:14:52 AM org.apache.catalina.core.ApplicationContext log
SEVERE: Exception while dispatching incoming RPC call
javax.servlet.ServletException: Content-Type was 'text/plain; charset=utf-8'. Expected 'text/x-gwt-rpc'.
   at com.google.gwt.user.server.rpc.RPCServletUtils.checkContentType(RPCServletUtils.java:318)
   at com.google.gwt.user.server.rpc.RPCServletUtils.readContentAsUtf8(RPCServletUtils.java:135)
   at com.google.gwt.user.server.rpc.RemoteServiceServlet.readContent(RemoteServiceServlet.java:335)
   at com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:77)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
   at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:857)
   at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:565)
   at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1509)
   at java.lang.Thread.run(Thread.java:619)