[displaytag-user] getting noSuchMethod error

[Chawla, P. M <Paw...@ap...>]

I am getting the following error - any idea why ?
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
eThread: '83' for queue: 'default'> <> <> <101017> =
<[WebAppServletContext(683952
1,gff,/gff)] Root cause of ServletException>
java.lang.NoSuchMethodError
        at =
org.displaytag.export.MediaTypeEnum.iterator(MediaTypeEnum.java:145)
        at =
org.displaytag.tags.TableTag.getExportLinks(TableTag.java:1424)
        at =
org.displaytag.tags.TableTag.getTableFooter(TableTag.java:1377)
        at org.displaytag.tags.TableTag.getHTMLData(TableTag.java:1225)
        at org.displaytag.tags.TableTag.doEndTag(TableTag.java:847)
        at jsp_servlet._jsp.__shipment._jspService(__shipment.java:387)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)


I am using :=20
displaytag-1.0-b2.jar
commons-lang-2.0.jar
displaytag-11.tld

Thanks,
Pawan