Hit the same issue today after upgrading my LS-CH2.0TL firmware (which was forced upon and a real challenge to install ) to 1.6. Tried using acp_commander, telnet wouldn't connect and and not sure if they use th same port.
Cant believe that LS team have still had this issue after over an year and now I cannt access the shared folders on my LS. Real annoyed but just holding my patience to find a fix.
I am gonna call the support tomorrow. fingers crossed.