Wrong username / password when connecting to mac

my wd live tv used to work properly and now i am one step before breaking it.

My mac has 1 user with password and when the wd live tv is searching for networkshare, after clicking to the correct pc to connect, it asks for u/p. When i enter my info it cant connect. I ruined more than 6 hours trying everything from leaving blank password to mac, adding new user with pasword to mac, but nothing. When i connect from another mac or pc to the mac i want to use as a network share, everything works as magic.

i run latetest firmware.

Thank you…

Hello, see if the following link helps.