Http Error

Everytime when I redirect from one particular page to another, it will raise 4 exceptions, before Page_Load routine runs. I can't figure out a way tofind out what are the exceptions. When I use Application Center Test, number of Http errors rises with the number of requests, so I suspect those are Http exceptions.

The worst part is that, when total number of exceptions accumulated to certain extent, it seems to cause messive exceptions in aspnet_wp.exe process (24000 per second), which easily max out the processor. I can't end it unless I manually kill the process.

how I can figure this problem, or what you think may cause this kind of error?