Microsoft JScript runtime error: 'Sys.WebForms.PageRequestManager' is null or not an object

Question

Microsoft JScript runtime error: 'Sys.WebForms.PageRequestManager' is null or not an object i have use ajax script to check user availablty but i get this error how to solev this pls help me

Vithal Wadje · Answer

are you using any Ajax control

Muralidharan Deenathayalan · Answer

Make sure you've all the web.config dll references and js references are present in your project. Are you getting error in only one page or every where in your project? Possible post post the complete stacktrace?