asp.net - Error after migrating AjaxControlToolkit 1.x to 3.5 -


i'm getting error after migrated ajaxcontroltoolkit 1.0... 3.5 recently:

extender control 'alwaysvisibleloading' cannot extend 'updateprogress1'. extender controls of type 'ajaxcontroltoolkit.alwaysvisiblecontrolextender' cannot extend controls of type 'system.web.ui.updateprogress'

couldn't helpful references on far. anyone?


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