Crystal report viewer display blank page

Copy and paste following code into web.config file

<configSections>
    <sectionGroup name="businessObjects">
      <sectionGroup name="crystalReports">
        <section name="crystalReportViewer" type="System.Configuration.NameValueSectionHandler"/>
      </sectionGroup>
    </sectionGroup>
  </configSections>

  <businessObjects>
    <crystalReports>
      <crystalReportViewer>
        <add key="UseBrowserLocale" value="true"/>
        <add key="resourceURI" value="~/aspnet_client/system_web/4_0_30319/crystalreportviewers13" />
      </crystalReportViewer>
    </crystalReports>
  </businessObjects>