ReadyNAS default credentials not working

So i'm trying to setup my ReadyNAS Pro 6 on a new network (transitioning from an old network) and I've managed to get RAIDar to recognise the device however when I try to access the admin page and put in the username/password it doesn't work. I've tried resetting the OS a number of times and used the default username/password (admin/password) but nothing has worked. Each time I go to input the credentials and press sign in, the pop-up window disappears and then reappears. I've tried using different browsers (I'm currently on chrome) but that hasn't worked too. Any help would be appreciated. Thanks.