optical drive will not load DVD!!!
i am trying to load ms office 2011 on to my imac. when i insert the disc it spins a few times then ejects it without loading. i have tried loading cd's and they load ok but when i tried to load a different dvd that had loaded ok in the past it did the same thing and would not load! i have checked all of the settings and they all appear to be ok. can anybody help me with this?
iMac, Mac OS X (10.6.8)