Hi,while running AS2004, I have NONE problems, all is going well. But as soon AS2k4 does a update online and writes the data info FS9 and FSUIPC, my framerates are dropping extremly low! And when I am just flying with a powerfull addon aircraft like PMDG B737-900 at a time compression of 4x, the framerates drops down to 1 fps and my FS9 gets uncontrollable, so does the Boeing I am flying the most these days! That is only when AS2004 updates...Do you have any idea what causes this or how to solve this problem? How can I do a LOOOONG trip with time compression without being at my screen all the time monitoring what FS9 does???

TAH,I have tired a couple of things, that you may want to consider also. I too now use the PMDG 737-800 with ActiveSky and I am getting good frames too during regular flight. However in my options window I have the update cycle set to 55 minutes. Meters only change once an hour so I don't need those constant updates. Yesterday I changed AS update option "don't update below this altitude" from 25000 feet to 39000 feet. Needless to say I got no update stutters, but I did this to experment with the wind shift problem. It did not fix it, but I did change back to 29000 feet for that option. Why, most of my wind shifts occur as I am passing through wind layers during climb-out and again on descents.Hope these might work for you.Bob