Help with router.

I have a program called "SBRealy" that is used to connect to my Flight Simulator. We just bought a new router and now it won't let me connect. It says:

041204 07:17:55 ERROR creating FS2004 session. DirectX is reporting an error because UDP port 6073 is already in use. This can often be fixed by disabling your firewall or reconfiguring it to allow this port to be used by FSHost. McAfee's PrivacyService can also cause this problem. Some users have also reported that disconnecting their router from the internet before starting FSHost can fix the problem.

Can some one help me get it to work? Can I change the router settings?

PS: The router is a "Linksys Wireless - G, Broundband Router with SpeedBooster"

Thanks

 

Do you know how to get into your router settings? It will be something like typing in 192.168.1.1 in your internet explorer window. You will want to open the UDP port 6073. Try that first and see if that fixes your problem.