Hi , i use fopnu and share some folders , today i tried to see my share and i see "Remote user is offline" , this is my user on my server .. i restarted and same problem...

NAT on your router (or your ISP's router further down the line) should be configured to enable so-called hairpin traffic (from the internal network addresses to external addresses assigned to them, then back to corresponding devices). Without it, you are only able to check your client from a different ISP (or maybe ask someone in the channels to test it if it's a public share).