several games giving me backup problems

[OSIAS]

just so u know i am not knew to making backups

i have successfuly backed up halo and splinter cell and mech assualt


i am having problems with star wars obi wan and rocky

has anyone else had problems with these 2 games.
is their maybe a patch or something i have to do before i ISO it?

see after back up the game loads just fine...
on obi wan i go to load any level and the loading bar stops at 3/4 and goes no further for any type of game or level.

for rocky it actually loads a loadup startup screen for the game and then says that the disc is dirty or damaged..

so whats up with that thought to make backups is a simple ftp in copy over create an iso and burn ...

so am i missing something here?
thanks in advance

or should i just reburn them and try again?