[mikedomi]

i have not seen any mm disc that have a Security type on it
is this and old disc have you had it for a while

now for a little info
i have had 10 disc out of 3.000 that looked great had nothing that you could see wrong with your eye no Security on the disc at all but
would not load

here is what you have to do
make a back up copy of the disc and use the copy to put it in hoster
for some reason that i could not find some disc have a problem brand new out of the case

making a back up will 99% of the time take care of this
just as long as the disc has no Security on it

hope this helps