MX Key has two things.
1) Smart Card
2) P-key
It might be the problem of P-key.
Please try to install in another computer. Still, there is problem, then, plug out the "Smart Card" and put it to another "P-Key" or Box that you have.
Download the GIF file and watch out:--
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http://www.MegaShare.com/1649574
Password:- sairam