I hope someone can help. I was very pleased with 4.5 but after upgrading I constantly get a frozen FS9 and a blue screen indicating stuck in a loop caused by nv4_dsp.dll. It only happens when ActiveSky is running. My system:Dell Dimension 83001 gig ramP4 3.2 ghz WinXP SP2Evga GeForce 6800 UltraForceware XG 80.40 driversDell 21" Flat Panel running 1600x1200Soundblaster LiveDrive 5.1 I run my desktop at 1280x960 but FS9 at 1600x1200 full screen.. I have the latest bios ang have tried at least 20 different video drivers in the past 2 months.ActiveSky is Build 314 running 256x256 clouds and did a mips conversion. (btw, my framerates dip as low as 5-6 in lots of clouds but was much, much better with AS4.5)I almost always fly a Dreamfleet A36 and for visual flight with mostly clear conditions, the display sliders are almost all maxxed except for traffic(10) and water (0). No glare, flare or speciel effects.I'm getting to the point where I don't use ActiveSky very much because I know at a certain point it will lock up. Then I spend hours trying more to correct it and finally give up. Attached is a shot of the AS options.Michael

Hi,Sorry you are having trouble. In most cases it is not caused by AS.See if this article helps:http://support.microsoft.com/?scid=kb;en-us;325730Edit: Copy and paste the link!Please let us know if things get better or worse!Hope this helps,JimActiveSky Sales and Supporthttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg

Hi, Driver issue. As for performance to compare you should got the same metar,same setting and same clouds type loaded in fs2004.BIOS, AGP aperture make sure the setting is the correct one.ThanksChris WillisHiFi Simulation Software Team Developerhttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg

I cleaned out the present driver and installed the latest (77.77) from Nvidia. Still freezes in endless loop, but only with ActiveSky running. Why is that?Michael

Hi,Did you also update your chipset drivers as stated in the article?Hope this helps,JimActiveSky Sales and Supporthttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg

Hi>I run my desktop at 1280x960 but FS9 at 1600x1200 full screenThis is known to cause fs lockups, it did with me. It is recommended to have the desktop and fs running at the same resolution.Have you tried changing your fs resolution to your desktop resolution.? running FS in window mode at 1280x960?Just my 2 cents worth.Hope this helpsTony

Bios is up to date. Went back in time and installed Nvidia 71.89 drivers. I finally completed a flight! :-) I'll keep my fingers crossed. Thanks for the help guys.

Hi cloudflyer,You can also rebuilt the window paging files.ThanksChris WillisHiFi Simulation Software Team Developerhttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg

You can also rebuilt the window paging files.How is this done and what is the benefit?Michael

Hi Michael,This can prevent some CTD.Here tips to improve performance as well and can fix problem.http://support.microsoft.com/default.aspx?...069&Product=gmsThanksChris WillisHiFi Simulation Software Team Developerhttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg

If this IS a driver problem, why is it that I have tried the 80.xx drivers, 77.77, 77.72, 77.56, 77.18, 71.89 and the problem persists; only with ActiveSky running.Michael

Hi Michael,Did you update your chipset drivers? Not your BIOS, but your motherboard drivers.Hope this helps,JimActiveSky Sales and Supporthttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg

How do I determine the chipset driver version presently installed to see if the version I just downloaded is newer?Michael

Hi,AGP driver or miniport driver.Hope this helps,JimActiveSky Sales and Supporthttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg

>Hi,>>AGP driver or miniport driver.>I'm sorry. I don't understand.Michael