asp.net ajax clinety side Sys class not working in content page

I have a masterpage on which script manager has been placed . In my content page

Sys.Application_load and all other client side classes does not work , geeting object expected javascript er开发者_如何转开发ror.

Same thing works in another content page with another master page in same project. All dlls & settings in web.config are perfect & working for other pages , except that one.

Plz help !!! I have got stuck!

If other pages work, your problem is most likely in that content page. Be a programmer, debug it. Start taking out pieces of the page until it works and then see what you've taken out. Otherwise we're going to need some code.