First, did you rename your server to something other than "tower" ?? if so, use your alternate name.
Next, after pressing the button in unMENU to share a unprotected disk, either on a telnet connections or after logging in at the system console, type
It will list the names of the "shares" on your server. "sdd1" should be there.
In unMENU, once you share the un-protected disk, the button will change to "Un-Share" if it is then being shared. Did the label on the button change?
Lastly, what version of unMENU are you using? and what version of unRAID? (The location of the samba control files changed from early versions of unRAID. If you are using an old version of unMENU it might be the reason for your problems.)