Well ,
your advice was correct.
Home pc had remote desktop connection disabled.
I enabled it and i was able to remote control it.
Now, since (with your help) i made to remote control my home pc with NR portable from another pc it is time to try to do it from office.
The plan says that i first try to do it normally.
If failed i will try a socks 4/5 connection.
I doubt that i will make it (specially with my level of knowledge which is obviously low from the posts above) but i will try anyway since NR advertise that it can connect even from behind firewalls
Once more,thank you very much for your help.
Regard,
the observer.