If you’re trying to work with Information Policies, and you see the following error, you need to look at the KB article linked below.

http://support.microsoft.com/default.aspx?scid=kb;EN-US;927164

The file '/_layouts/DocumentConversionSettings.ascx' does not exist.   at System.Web.UI.Util.CheckVirtualFileExists(VirtualPath virtualPath)
   at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)
   at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)
   at System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath)
   at Microsoft.Office.RecordsManagement.InformationPolicy.ApplicationPages.PolicyConfig.OnInit(EventArgs e)
   at System.Web.UI.Control.InitRecursive(Control namingContainer)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Troubleshoot issues with Windows SharePoint Services.