Nx client works only from linux

Dear all,
I am not even sure on how to ask help on that… but I am desperate.
I can connect succesfully from my linux box at home to my linux pc at work.
When I though try the same from my window box at home (when I can not restart) I am not able to connect to.
I am using putty to create me a tunnel through my works gateway. I am mapping my localhost 4000 port to my works ip address port 5902 (where nx client is running too).

Although windows can not connect.
Where should I ask that to get support?
Regards
Alex

Microsoft?