Using NetCat to transfer files

[Darkade]

Hello, I'm trying to use NetCat to transfer some files in my local network. The thing is that netcat seems not being opening ports. I mean when I

$ nc -l 3333

in my computer netcat seems to be listening to port 3333. But when from another computer I do

$ nc this_machine's_ip 3333

I get some conection refused error, saying that the port ain't available.

(UNKNOWN) [this_machine's_ip] 3333 (?) : Connection refused

The ip is right since when I ping it it says the machine was found. I've also try to 'port forward' port 3333 to this machine but that wouldn't work neither.

So, how can I make nc listen on that port? or is it that such port is blocked? or am I using nc in the wrong way?
thanks

[athlon_crazy]

try using nc with -p option

nc ipaddress -p 3333