@NiLuJe: no idea. I try to stay away from OS X

@Ramon112: make sure that 192.168.2.1 is really the IP to connect to, that the port is correct, and that there's actually a VNC server listening there. Not sure what the :1 means, shouldn't VNC listen on 5900? Or does it automagically add 5900? (In which case you may want to try :0)
Anyway, you're trying to connect somewhere where there's no VNC server listening. If you tell it to connect to a listening VNC server, it should work.