Hello, It's been recommended that I post the above problem here rather than in the MSFS forum.I've added a PC2700 512MB stick of RAM to my machine. It registered fine, no user intervention required in the BIOS, and Windows XP shows the new memory added.Now then, I've been using fs2004 this evening and it crashes all the time - 12 times so far within 5 - 10 mins of launching fs2004! Sometimes it gives the error report (details mention panel.dll) sometimes it suddenly crashes to desktop in an instant and twice it caused an instant reboot with a subsequent disk check. No other applications on my machine have crashed tonight so far (OE6, IE6 and Excel 97). I've played with addon aircraft, default aircraft, slewing, different locations, weather and it crashes. Mostly it happens when I change view to the outside but other times its simply happened out of the blue - highly inconsistent.I've added the crucial.com stick of ram to the first slot. The second and third slots are occupied by two sticks of PC2100 256MB Ram. I asked crucial before purchasing and they said that the faster speed of the module will default to the slower speed of the other two modules.Now the only other change has been the installation of editvoicepack 3.0 last night, but I doubt this is the problem as so far there have been no postings about problems with it.*********************Later experimentI've now removed the two 256mb modules and now fs2004 runs fine with just the new 512mb stick. I've run fs2004 for half an hour, using different planes, panels, views, actions & locations and there have been no problems.I then add the two other sticks and hey presto, it suddenly reboots when I pan down to some crt gauges in an A320 virtual cockpit (Project Airbus with Eric Marciano's gauges).I hope it can be fixed with some BIOS tweaking, failing that I hope dabs.com can have a good returns policy!Any suggestions?My specs:AMD Athlon 2100+1*512MB PC2700 + 2*256MB PC2100 RamMSI Ti4200 64MB with 44.03 driversMSI KT3 Ultra 2 MotherboardWindows XP homeAnthony Dyer

Hi Anthony,what speed was your PC2700 RAM running at when you tested it on its own? Try running it at 266MHz (2x133), and see if it's still ok. If yes, try again with one of the 256MB chips added, and set the RAM FSB speed manually to 266MHz (Don't use the 'auto' option in the BIOS). If that's fine, add the other 256 stick. If you now have a problem, remove the first 256 stick and try again. If the problem is still there, move the second 256 stick to the free slot (where the first one was), and try again. Basically, try all chips one by one, setting the FSB speed manually, and then try all possible slot combinations...Cheers,Gosta. http://hifi.avsim.net/activesky/images/wxrebeta.jpg