my dvd rw copies fine but when I put in a blank dvd-r it knicks it out and tells me it\'s bad....when I put a dvd-r in my laptop and look at the properties it telling me that all the space is used these are brand new and I check about 50 of them and they all are showing no free space, this started about a week ago it was doing fine before that changed brands of DVD-R's still the same thing.