It seems if you set a background color either for the modal popup as a whole or any control within the modal popup then the password strength indicator's z-index is too low so it is hidden behind the modal popup and cannot be seen.
Comments: This issue is fixed in [ASP.NET AJAX Control Toolkit v.15.1.3](http://ajaxcontroltoolkit.codeplex.com/releases/view/616861)
Comments: This issue is fixed in [ASP.NET AJAX Control Toolkit v.15.1.3](http://ajaxcontroltoolkit.codeplex.com/releases/view/616861)






