Please help..

Hi all,

I am now try to add more device in the mobile preview page by using code file.
And i am following this blog post to change the MobilePreviewView.acsx.
But it alert me that "Value cannot be null. Parameter name: key"

I don't have any idea  how to continuous my work.
 Any one can help me?

Many Thanks.

Hello Tom,

We have answered you on the other forum ticket that you have opened:

www.sitefinity.com/.../preview-for-smartphones-tablets-question---device-update

Regards,
Stefani Tacheva
Telerik