Device doing an infinite loop on blackberry devices

So i enabled automatic redirection and i'm using 2 different url's for mobile and desktop. I tested on ipod, iphone, android.. the redirect works perfectly... But when i test on a blackberry as soon as i visit the desktop website it sends me in a loop between the mobile and desktop only to crash..
Another issue is that when i want to view the desktop theme on mobile and i enter the m.domain.com/?device=desktop
i get the infinite loop again.. Anyway to fix that infinite loop ? Thx