Studio pass not working

Please Can you update Studio pass!, is not working. Finally I bought a new Ipad because your IC PRO cubase doesn’t work correct with my Ipad3, and now, when I thought that all my problems were solved. and I and my clients can use studio pass, is not working. My clients use Iphone most of them, and i tried with an Ipad 9th. Doesn’t work.
Thank you

… what exactly is not working?