i have tried everything but it still says "you appear to have firewall or router problem that is stoping u from playing games"and there is no option of "continue".
What to to..

try to turn the firewall off?
you might also want to open your 16000upd port

Yeah, try to forward that port in your router and check if the option Upnp is enabled (in your router as well)

I have the same problem? Is it for sure that the reason is firewall because I put gameranger into exceptions list but the same msg comes out agaqin

go to your router's setting and disable it