Hi i get this error when i try insert data in to oracle 10g. I used the below tech jdk 6, eclipse, Apache Tomcat/6.0.18, Webservice and siebel crm When i try to insert without webservice , it was successful But after my SIEBEl CRM login , i tried this but i get an error Quite strange to look at . May be some jars missing or an error ???? Error stacktrace below : description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/cxf/frontend/ClientProxyFactoryBean org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) root cause javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/cxf/frontend/ClientProxyFactoryBean org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:852) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781) org.apache.jsp.ToInsert_jsp._jspService(ToInsert_jsp.java:111) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) root cause java.lang.NoClassDefFoundError: org/apache/cxf/frontend/ClientProxyFactoryBean java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClass(Unknown Source) java.security.SecureClassLoader.defineClass(Unknown Source) org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1847) org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:890) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1354) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233) java.lang.ClassLoader.loadClassInternal(Unknown Source) com.mtsi.leadportal.ondemandhelpers.LeadHelper.getLeadProxy(LeadHelper.java:36) com.mtsi.leadportal.ondemandhelpers.LeadHelper.insertLead(LeadHelper.java:55) com.mtsi.leadportal.Controller.createLead(Controller.java:93) org.apache.jsp.ToInsert_jsp._jspService(ToInsert_jsp.java:89) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) root cause java.lang.ClassNotFoundException: org.apache.cxf.frontend.ClientProxyFactoryBean org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233) java.lang.ClassLoader.loadClassInternal(Unknown Source) java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClass(Unknown Source) java.security.SecureClassLoader.defineClass(Unknown Source) org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1847) org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:890) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1354) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233) java.lang.ClassLoader.loadClassInternal(Unknown Source) com.mtsi.leadportal.ondemandhelpers.LeadHelper.getLeadProxy(LeadHelper.java:36) com.mtsi.leadportal.ondemandhelpers.LeadHelper.insertLead(LeadHelper.java:55) com.mtsi.leadportal.Controller.createLead(Controller.java:93) org.apache.jsp.ToInsert_jsp._jspService(ToInsert_jsp.java:89) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:717) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267) javax.servlet.http.HttpServlet.service(HttpServlet.java:717)