Environment: ASP.NET, AJAX.NET and MySQL DB
I got error return when using one of the form written in AJAX.NET when calling MySQL Stored Procedure
Sys.WebForms.PageRequestManagerServerErrorException: an unknow error occured while processing the request on the server. the status code returned from the server was: 500
Well, after check around i found out that the problem is in the MySQL Stored Procedure case sensitive issue. Change the case and problem solved!