Serious problem with my cd-writer and backups

[Magnetic]

hi,


i made a few backups today of some new games i got...when i tried to install from the back ups, none of them worked...same problem with every game...during installation i get an error message which says that some file on e:/
can´t be read and that i should check if it excist or if i have permission to access is...what´s going on there??


then i tried to install from my dvd-drive---> same problem there


is my burner damaged?? well, i got it for quite a long time, but i nerver had probs, this is the first time. it´s a ASUS CRW 5224A...

when i insert the original disc, it installs without problems...so i guess it can´t be damaged then, right?

so what could be the problem if the cd writer is ok??

thanks for any help