No folder shown on other computer on network

Hello,
I have Windows 7 Home Premium and Windows 8.1 on the network. The Win 7 computer has Serviio V1.6 installed and the server works fine to the Sony Bravia I have. The MediaBrowser works fine on the server machine also.

In the Presentation I have Video and Photos set as Display Content only and the same for the Folders only.

On the Windows 8.1 machine, I key in server IP address:23424/mediaserver and obtain the login screen. I key in the password and obtain the MediaServer title with the rest of the screen just black - no folder shown. There should be 2 folders shown, Photos and Videos as they are on the Media Browser on the server machine.

What am I missing here.
Thanks

Since the server machine shows the mediaserver in the Firefox browser correctly, I assumed that Firefox must be ok.
However, when I launch Internet Explorer on Windows 8.1 machine with the URL of server IP address:23424/mediaserver, it appears work fine as it is supposed to.
So, my problem turns out to be a Firefox problem and not a Serviio problem.
Thanks anyway.

Since the server machine shows the mediaserver in the Firefox browser correctly, I assumed that Firefox must be ok.
However, when I launch Internet Explorer on Windows 8.1 machine with the URL of server IP address:23424/mediaserver, it appears work fine as it is supposed to.
So, my problem turns out to be a Firefox problem and not a Serviio problem.
Thanks anyway.

The actual fault was that the cookies were disabled. Once the cookies were enabled mediaserver worked properly showing all the folders.
Thanks