I have an umbraco 452 site with contour, been running fine for quite a while, however on a deep page i found this error which I am sure started after installing contour,

Error creating usercontrol (/usercontrols/PinCodeTracking/Edit/ExpressRegister.ascx) c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\d761d259\31e02c43\AppWebexpressregister.ascx.a84f041d.gqft8ep.0.cs(513): error CS0433: The type 'AjaxControlToolkit.PasswordStrength' exists in both 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\d761d259\31e02c43\assembly\dl3\511da1a2\278f6f354c0dcf01\Umbraco.Forms.References.DLL' and 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\d761d259\31e02c43\assembly\dl3\3edf755d\45fc8f1e_4c0dcf01\AjaxControlToolkit.DLL'

In my web.config under run time I have,

<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">

  <!-- Old asp.net ajax assembly bindings -->
  <dependentAssembly>
    <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35" />
    <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="4.0.0.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35" />
    <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="4.0.0.0" />
  </dependentAssembly>


</assemblyBinding>

Am I missing something?

Regards

Ismail