BTN2GO

I am unable to access the BTN2GO streaming service.  I cannot reach the sign-in screen when I reach the Select Provider screen,  When I click on the COX provider box (or any other provider box) nothing happens.  I spent four hours trying to resolve the problem.  BTN support insists that COX causes the problem, even though the problem arises before I identify any provider.  Cox support insists that BTN causes the problem.  Indeed, COX support was unable to reach the BTN sign-in screen while I conferred with them by phone.  I am using a PC laptop with Windows 8.  I tried to access the BTN2GO sign-in screen many times, using both Firefox and Internet Explorer and after deleting all cookies.. .