cfossa,,,,if you read one of my previous posts here,i used the same computers,same ISP a while back,upgraded without a problem on all of my computers.All i did was reformat my computers,nothing changed on my end at all.Got to be something with Great Planes server setup,it has changed somehow.Thats ok,i am saving up money right now for AeroFly,wasted $460 on Real Flight,that will not happen again.