Hi, 

I have been working in Online billing web application . It is working fine in localmachine.when installed on the production server I have getting  the following exception intermitantly.We have installed nearly  on 300 servers but only on one server we are getting the error.We are maintaining Access data base to store for  for individual user theme.

'Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 500'.

 We are using themes.In login page when user submitting the login information the specified exception is rasing.Is the following exception might be the reason.But we are not getting in the remaining servers.

 LogDetails:

 Can U please tell the reason.

Thanks

I've been experiencing this problem today, and from reading around, it appears that it is an issue with recycling the application pool in IIS. If you increase this on your server, it should solve the problem.

The other causes are listed here : http://forums.asp.net/t/1044963.aspx

I finally find the solution for my problem.When user enter a password with angularbracket and any letter like (<a,<b)  raising the exception.

By  setting ValidateRequest =="false".