Anyone Know The Answers ??

How come I can burn a working version of Looney Tunes Space Race & UFC both of which are Self Boot and yet when I try Shenmue & MSR they seem to burn OK but when I try reading back in PC they come up as (File Format Not Found or This Drive Isn't Working Correctly) ?needless to say they don't work in the DC I am using PSXCopy 6.0 and have a HP MEDION 9340 Writer..