Javascript error with Firefox and IE11

Hi guys,

if you try to launch the demo overview of radcaptcha Q2 2015 (at http://demos.telerik.com/aspnet-ajax/captcha/examples/overview/defaultcs.aspx ), will be thrown a javascript error "ReferenceError: global is not defined" with Firefox 40.0.3

With IE11 will show an alert box "Silverlight locked and obsolete...".

I'm trying to use the trial version in my project and I need to workaround this problem before buy the commercial version.

Any suggestion?

Thanks