i bought the S2 license
i wanted to host so my friends can join.. so.. i created a room
my friends were serching for it.. but it didnt find them for them
someone told me maby its my router problem
can someone help me?

Did they try the "Join specific host" menu and entering your host name?

yes they did

did they spell it right ?

How did you "create the room"? Using the LFS client or the dedicated host?
Either way, make sure visibility is set to "Internet", that should put the host on the hostlist regardless of whether people can connect or not.

If your friends still can't connect after this, it's probably a router problem like you said.
This should help solve that

aww.. my router model isnt there :S
someone know if i need to open ports or something?

Quote from OpE :

aww.. my router model isnt there :S
someone know if i need to open ports or something?

You do, TCP and UDP for the port you're running the server on. Default is 63392 I think.