As per the Microshaft website:
•DirectX 11.2 is included in Windows 8.1, Windows RT and Windows Server 2012 R2.
Note There is no standalone update package for DirectX 11.2. You can only install this DirectX version through Windows Update in Windows 8.1, Windows RT and Windows Server 2012 R2.
In addition to that your card may not support that version. What are your system specs including the model numbers of your motherboard and GPU card?