ReadError "No accessrights" as root!

Hallo, Kernel 2.4.18 original, patched with packet2.4.18_patch, udftools 1.0.0.2b, IDE-Writer Teac 524E, Caching enabled in Kernel: I tried to use packetwriting for transporting data from one pc to another on CDRW. Now on 2 different RW's, containing the same data, i get an "access denied" message on some files and directories, when trying to see them with mc or ls (means, this files/dirs aren't to see, i see only the err-mess) - also when logged in as root. I think, this points to defect writing. Could that be because write caching enabled? Greetings-- Email:KOALASOFT@GMX.DE