[opencms-dev] err

[volny]

I successfuly instaled OpenCms. But this message appears always I try edit some page (or create new one):
-----------------------------------------------
type Exception report
message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: Servlet execution threw an exception

root cause 

java.lang.NoSuchMethodError: org.apache.xerces.dom.CoreDocumentImpl.getEncoding()Ljava/lang/String;
	com.opencms.template.CmsXmlXercesParser.getOriginalEncoding(CmsXmlXercesParser.java:193)
	com.opencms.template.CmsXmlXercesParser.getXmlText(CmsXmlXercesParser.java:131)
	com.opencms.template.A_CmsXmlContent.getXmlText(A_CmsXmlContent.java:684)
	com.opencms.template.A_CmsXmlContent.getXmlText(A_CmsXmlContent.java:673)
	com.opencms.file.CmsResourceTypePage.copyResource(CmsResourceTypePage.java:391)
	com.opencms.file.CmsObject.copyResource(CmsObject.java:684)
	com.opencms.workplace.CmsXmlTemplateEditor.createTemporaryFile(CmsXmlTemplateEditor.java:100)
	com.opencms.workplace.CmsXmlTemplateEditor.getContent(CmsXmlTemplateEditor.java:439)
	com.opencms.template.cache.CmsElementXml.getContent(CmsElementXml.java:171)
	com.opencms.template.cache.CmsUri.callCanonicalRoot(CmsUri.java:185)
	com.opencms.template.cache.CmsElementCache.callCanonicalRoot(CmsElementCache.java:149)
	com.opencms.launcher.CmsXmlLauncher.generateOutput(CmsXmlLauncher.java:285)
	com.opencms.launcher.CmsXmlLauncher.launch(CmsXmlLauncher.java:341)
	com.opencms.launcher.A_CmsLauncher.initlaunch(A_CmsLauncher.java:274)
	com.opencms.core.OpenCms.showResource(OpenCms.java:956)
	com.opencms.core.OpenCmsHttpServlet.doGet(OpenCmsHttpServlet.java:310)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

note The full stack trace of the root cause is available in the Tomcat logs.

-------------------------------------------------------------------------------

j2sdk-1.4.1

tomcat 5.0.16 (with tomcat 4.1.29 is the same error)

XP pro

--------------------------------------

Please advice me what to do

Thanks

Joel
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