[ubuntu] Ubuntu Samba Client Won't Coect

I am ruing a fresh install of 16.04 and have previously coected it to a samba share at my home on the LAN. Where I currently am located I have an ASUS router with a shared folder which I am able to coect to from Windows 10, and a few Mac clients without any problems.

When I attempt to coect from Ubuntu by clicking 'Coect to Server' and using the ip address of the router, similarly as I've done from windows, I'm prompted for a useame, password, and the Domain is filled in as 'WORKGROUP'. I have the correct useame and password, but every time, I get no coection and the dialog box for useame/password keeps popping up. Any ideas?