MacBook Pro keeps ejecting CD/DVD from SuperDrive

[cebixd]

My MacBook Pro 13" Early 2011 keeps ejecting CD/DVD from SuperDrive. I can hear it, it tries to read and then poof, it ejects it. Does anybody knows a solution? Is is hardware or software problem?

 

[Fishrrman]

Does it do that with every CD or DVD you try, or just one?