Thunar opens some files but not others from Network

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http://crunchbanglinux.org – This weekend I put #! Waldorf 20120927 on a 2008 vintage dual core Athlon desktop PC with 8G RAM and Nvidia graphics (7300 something or other).Went through the cb-welcome script, quitting without installing ssh stuff.Installed LibreOffice (LO) and Chrome from the menu. Installed the LO pdf-import extension from Synaptic.Installed PlayOnlinux and Wine  from Synaptic so I can run LTspiceIV.Installed Openshot, Kicad and Unetbootin from Synaptic.I have a Buffalo NAS which I can see and browse around in Thunar. I can save files to it and copy files from it.The problem is that some files I can (HowTos)