Hi
Did you have a look at this newer thread with a similar question?
#241
I don't have an immediate solution, but remind that you don't new to enter the full path, only the share name in Rune.
Also be aware of the difference between your new OsX user (Streamer) and the short unix name you may have entered (usually lowercase) that you should use for the mount.
Finally you may want to try the mount manually from rune command line interface (accessible through ssh), having a look at:
https://wiki.archlinux.org/index.php/samba#Manual_mounting
Jean-David