Teamviewer says its connecting and then ends

[netb2b]

I cannot connect to partner using teamviewer (Machine 1 to machine 2) . The other way around is ok.

Whenever I click connect, it asks for password and splashes screen that its connecting but suddenly ends.

The session with - is finished (0:00).

If I connect the other way around (machine 2 to machine 1), that works but after 2 or 3 tries.

I am using teamviewer 10.0.47484