Created Unassigned: Exception in ajaxcontroltoolkit.. type._registerScript [27626]

Hi,

I am having following exception in my asp .net projects. It was working fine with .net framework 2.0/3.5 and ajaxcontroltoolkit..

Recently I upgraded my project to .net framework 4.5. Now I am getting the following exception. I am having this exception with old ajaxtcontroltoolkit and also with ajaxcontroltoolkit 2013 with .net framework 4.5.

This exception is in ajaxtcontroltoolkit project..
0x800a01b6 - JavaScript runtime error: Object doesn't support property or method '_registerScript'

I will appreciate any help.

Thanks..