I want to display the url as Facilities.aspx instead of page.aspx?pageid=110002

For that I try the following code

<urlMappings enabled="true">
    <add url="Facilities.aspx" mappedUrl="page.aspx?pageid=110002"/>
  </urlMappings>

But i got an error message like

" Unrecognized configuration section urlMappings."