CS 6 perspective warp doen't exist

Hey,

I have a problem: I'm using Photoshop CS 6 from the CS 6 design standard (Adobe Photoshop Version: 13.0.1 (13.0.1.3 20131024.r.34 2013/10/24:21:00:00) x64).

I heard that CS6 has the perspective-warp function and I really need to use it. But in my version this function doen't exist.

I read about the problem, that this function sometimes is not availible because of settings with the graphic processor, but this isn't the case, I can't see this function it isn't there.

Could anybody help me or tell me why it is so and how I could change the situation?

Thank you,

greetings,