Do you have any other security software running? Anti-Virus (AVG, Avast, Norton, NOD, etc...), Anti-Spyware (Spybot (TeaTimer), Ad-Aware, Threatfire, Spyware doctor, etc...), or any other security software actively running in the background? If so, try disabling it for the time you're attempting to run Aces High.
If that doesn't do it, there is a possibility that you have a router connected to a router. For example, your Cable Modem is actually a router in itself, yet you have another router attached to the cable modem. So you have to configure two firewalls, not just one.