Created Issue: OutOfMemoryException in ExtenderControlBase.Dispose [27343]

I am making application in asp.net framework 4.0 with latest ajaxtoolkit, and sql server 2005 for database, but I am getting error as

Exception of type 'System.OutOfMemoryException' was thrown

i had debug it using breakpoints, so i got that in Ajax toolkit line no. 139 of function

ajaxcontroltoolkit.dll!AjaxControlToolkit.ExtenderControlBase.Dispose() Line 139

how do i resolve it.