I set up a test deployment of ultrasearch the default installation using oracle http server and Jserve. When i try to login to the ultrasearh adming tool from the home page I get the follwing error

Request URI:/ultrasearch/admin/control/login.jsp


Exception:
java.lang.NoClassDefFoundError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:120)
at oracle.jsp.app.JspClassLoader.loadClass(JspClassLo ader.java)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 53)
at java.lang.ClassLoader.loadClassInternal(ClassLoade r.java:313)
at _ultrasearch._admin._control._login._jspService(_l ogin.java:311)
at oracle.jsp.runtime.HttpJsp.service(HttpJsp.java)
at oracle.jsp.app.JspApplication.dispatchRequest(JspA pplication.java)
at oracle.jsp.JspServlet.doDispatch(JspServlet.java)
at oracle.jsp.JspServlet.internalService(JspServlet.j ava)
at oracle.jsp.JspServlet.service(JspServlet.java)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:588)
at
org.apache.jserv.JServConnection.processRequest(JS ervConnection.java:456)
at org.apache.jserv.JServConnection.run(JServConnecti on.java:294)
at java.lang.Thread.run(Thread.java:484)

This looks like a configuration problem can someone please tell me what casues this error and how to fix this?