Unable to change Framework version to 4.5.2 in plesk 12.0.18

[netedge]

Hello,

I have plesk version 12.0.18 for windows. Somehow when i go to control panel of a domain and select Asp.net settings > change version > (and then i select) 4.5.2 > it shows in the notifications that "Information: The ASP.NET version was successfully changed." however "Framework version" still remains the old one which is " 3.5.30729.4926 ".

In short the changes are not reflecting in the the menu or the plesk page. I have also attached the snapshot for understanding.