DNN site is working fine from long time. Yesterday Suddenly I received "Service Unavailable" message when I browse the site. When I checked the server, it seems that application pool was stopped so I started application pool and everything works fine. After sometime again site was down. I checked the event viewer on server found below things in Application section
"Faulting application w3wp.exe, version 6.0.3790.3959, stamp 45d6968e, faulting module kernel32.dll, version 5.2.3790.4480, stamp 49c51f0a, debug? 0, fault address 0x0000bef7."
Also found below
"A process serving application pool 'X' suffered a fatal communication error with the World Wide Web Publishing Service. The process id was '4524'. The data field contains the error number."
I have implemented the registery key solution mentioned in the below URL
http://www.webhostingtalk.com/showthread.php?t=508880
I have not updated the code for long times. Any idea why this error was occurred.