Hello everyone!

I got a my router, ASUS router RT-N66U, with a shared harddrive that I use as media server. Under my desktop pc I can see the harddrive and LOGIN to it and watch what's inside, but I can't do that on my laptop? I can see the drive on my laptop but when I try to open the location it just says that the login session doesn't exist? Please help me, im very clueless at this point.