[Vlad64]

Until now i've been using hamachi for my friends to be able to connect to the server, but today I managed to port-forward my both routers (modem and router). The thing is, when they try to connect, they get "Server did not respond, trying..." and the server console keeps saying "Incoming connection: ip : port". What's wrong? I'm using Windows 7 and my firewall and antivirus are disabled

[Bingo]

Try to disable the hamachi network.

Then disable your firewall. (Allow sa-mp to go out).