Cannot reach the NAS put ping works

After setting up the Duo v2 (confirmed it is a duo v2), but it's currently not working unfortunately. I made a share document in ReadyNAS, give acces to everyone first. In file manager and in Total commander I can see the folders like this: 

- Network (Workgroup)

- /my routers long name/

- ReadyNas Duo [NASname]

- NASname: ReadyNAS Duo v2

Cannot click on the bottom two, opening up the Network (Workgroup), and I see nothing, just blank, without folders and it also opens up slowly. In cmd I pinged the ip address of the NAS (192.168.0.xxx) and it works perfectly. I have read a bunch of articles, forum openings, nothing helped at this moment. Any advise? 

Thanks