exception error

I created a project for trying the example "TwoPageCrudTable" which can be found in the section "Technical Articles & Tips ". My display page is a little bit different as the one in the example: I don't have the drop down list, just load everything from the table. But when I run the project, I got the following error. Could anybody give some help? Thanks in advance! I don't know if it it because the table is empty.

Here is the error:

Exception Handler

Description: An unhandled exception occurred during the execution of the web application. Please review the following stack trace for more information regarding the error.

Exception Details: org.apache.jasper.JasperException

java.sql.SQLException: Internal Error in RowSetReader: no connection or command.

Possible Source of Error:

Class Name: org.apache.jasper.servlet.JspServletWrapper

File Name: JspServletWrapper.java

Method Name: service

Line Number: 384

Source not available. Information regarding the location of the exception can be identified using the exception stack trace below.

Stack Trace:

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:384)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:297)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:247)

javax.servlet.http.HttpServlet.service(HttpServlet.java:860)

sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)

sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:25)

java.lang.reflect.Method.invoke(Method.java:585)

org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:249)

java.security.AccessController.doPrivileged(AccessController.java:-2)

javax.security.auth.Subject.doAsPrivileged(Subject.java:517)

org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:282)

org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:165)

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFil terChain.java:257)

org.apache.catalina.core.ApplicationFilterChain.access$000(ApplicationFilterCha in.java:55)

org.apache.catalina.core.ApplicationFilterChain$1.run(ApplicationFilterChain.ja va:161)

java.security.AccessController.doPrivileged(AccessController.java:-2)

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain .java:157)

org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.jav a:723)

org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispat cher.java:482)

org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher. java:417)

org.apache.catalina.core.ApplicationDispatcher.access$000(ApplicationDispatcher .java:80)

org.apache.catalina.core.ApplicationDispatcher$PrivilegedForward.run(Applicatio nDispatcher.java:95)

java.security.AccessController.doPrivileged(AccessController.java:-2)

org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.ja va:313)

com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322 )

com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)

com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.renderView(ViewHandlerImpl.ja va:311)

com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87 )

com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:221)

com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)

javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)