So i have upgraded all the way through from 6 R2, with coversion of Pagetype builder along the way!

The front end of the site is working now, but I am unable to acess the UI, it gives page cannot be found!

I've removed the sites node from episerver.config and have checked the the application settings node is in there.

In the framework config i have the virtual path providers in there as well:

  <virtualPathProviders>
    <clear />
    <add showInFileManager="true" virtualName="Page Files" virtualPath="~/PageFiles/" bypassAccessCheck="false" indexingServiceCatalog="Web" physicalPath="C:\VPP\PageFiles" customFileSummary="~/FileSummary.config" name="SitePageFiles" type="EPiServer.Web.Hosting.VirtualPathVersioningProvider,EPiServer" />
    <add showInFileManager="true" virtualName="Global Files" virtualPath="~/Global/" bypassAccessCheck="false" indexingServiceCatalog="Web" physicalPath="C:\VPP\Global" customFileSummary="~/FileSummary.config" name="SiteGlobalFiles" type="EPiServer.Web.Hosting.VirtualPathVersioningProvider,EPiServer" />
    <add showInFileManager="true" virtualName="Documents" virtualPath="~/Documents/" bypassAccessCheck="false" maxVersions="5" physicalPath="C:\VPP\Documents" customFileSummary="~/FileSummary.config" name="SiteDocuments" type="EPiServer.Web.Hosting.VirtualPathVersioningProvider,EPiServer" />
    <add virtualPath="~/App_Themes/Default/" physicalPath="C:\Program Files (x86)\EPiServer\CMS\7.5.394.2\application\App_Themes\Default" customFileSummary="~/FileSummary.config" name="App_Themes_Default" type="EPiServer.Web.Hosting.VirtualPathNonUnifiedProvider,EPiServer" />
    <add virtualPath="~/ui/CMS/" physicalPath="C:\Program Files (x86)\EPiServer\CMS\7.5.394.2\application\UI\CMS" customFileSummary="~/FileSummary.config" name="UI" type="EPiServer.Web.Hosting.VirtualPathNonUnifiedProvider,EPiServer" />
    <add virtualPath="~/Util/" physicalPath="C:\Program Files (x86)\EPiServer\CMS\7.5.394.2\application\util" customFileSummary="~/FileSummary.config" name="UtilFiles" type="EPiServer.Web.Hosting.VirtualPathNonUnifiedProvider,EPiServer" />
    <add virtualPath="~/WebServices/" physicalPath="C:\Program Files (x86)\EPiServer\CMS\7.5.394.2\application\webservices" customFileSummary="~/FileSummary.config" name="WebServiceFiles" type="EPiServer.Web.Hosting.VirtualPathNonUnifiedProvider,EPiServer" />
    <add virtualPath="~/ui/CMS/" physicalPath="C:\Program Files (x86)\EPiServer\CMS\7.5.394.2\application\UI\EPiServer\CMS" customFileSummary="~/FileSummary.config" name="EPiServerCMS" type="EPiServer.Web.Hosting.VirtualPathNonUnifiedProvider,EPiServer" />
    <add virtualPath="~/ui/CMS/Shell" physicalPath="C:\Program Files (x86)\EPiServer\Framework\7.5.394.2\Application\UI" customFileSummary="~/FileSummary.config" name="EPiServerShell" type="EPiServer.Web.Hosting.VirtualPathNonUnifiedProvider,EPiServer" />
    <add showInFileManager="false" virtualName="SearchUserMapping" virtualPath="~/ui/cms/admin/SearchUsers.aspx" bypassAccessCheck="false" physicalPath="" customFileSummary="~/FileSummary.config" name="SearchUserMapping" type="EPiServer.Web.Hosting.VirtualPathMappedProvider, 
    EPiServer" />
    <add showInFileManager="false" virtualName="CreateNewPage" virtualPath="~/ui/CMS/Edit/NewPage.aspx" bypassAccessCheck="false" physicalPath="" customFileSummary="~/FileSummary.config" name="CreateNewPageMapping" type="EPiServer.Web.Hosting.VirtualPathMappedProvider, 
    EPiServer" />
    <add virtualPath="~/ui/CMS/" physicalPath="[appDataPath]\Modules" customFileSummary="~/FileSummary.config" name="ProtectedAddons"
      type="EPiServer.Web.Hosting.VirtualPathNonUnifiedProvider, EPiServer.Framework" /> </virtualPathProviders>
  <virtualPathMappings>
    <add url="~/ui/cms/admin/SearchUsers.aspx" mappedUrl="~/Admin/SearchEngageUsers.aspx" />
    <add url="~/ui/CMS/Edit/NewPage.aspx" mappedUrl="~/Templates/PageTypeTemplates/CreateNewPage.aspx" />
  </virtualPathMappings>

What do i need to check to make sure all the ui stuff is pointing to the correct location.

Thanks!

Nick