OK that looks fine.
I suppose you have a working mountpoint, and read/write permission for user.
Forgetting that gives the "empty folder" symptom.
If that is OK, you could try to check if your Samba share works with xSMBrowser.
Its available in Synaptic.

(Just to check if Samba shares work independent of Gnome specific features)
In xSMBrowser click on "Samba Config" to see accessible samba shares.
If both of the above are true, See if all 4 mentioned packages required are installed.
I can't think of anything else right now, so anybody please feel free to chip in.
