New Installation Says Photoshop CS6 License Expired

I have just installed Photoshop cs6 as stand alone, at the time of opening a popup box appears with a label “License has expired”. What should I do, I have so frustrated that I have just purchased a DVD and while isn’t working please anyone help me

If you purchased a legal license of Photoshop, check out their contact page: http://helpx.adobe.com/contact/