SuperDrive doesn't detect Windows 7 Installation CD

Hey Guys,

so I bought the following Windows Installation CD from Amazon: Windows 7/64bit/HomePremium/Note on CD: Intended for distribution with a refurbished PC. Well, since I was a bit confused with the "refurbished"-part, I checked the User-Questions, and people said there is no problem at all regarding this type of installation CD with Boot Camp.

However, my SuperDrive won't even detect the cd?! After about 20-30 sec. it get's ejected. I also checked through the Disk Utility Software and there was also no reaction at all from the SuperDrive.

Here are my specs:

- iMac 27"

- Mid 2010

- OS X Yosemite

Help would be appreciated. Thanks in advance

-mouse