Linda,
Welcome to RetouchPRO!!
Are you trying to change the read only attribute on your "original" RW CD? If so, make sure the CD is writable and not "closed to work in any CD player."
Also, what OS are you running? Might be a problem in W2K or WXP with administrator vs. user capabilities, esp. if you wrote to the CD as administrator? (Just a guess, since I've been having fun figuring out the whole administrator/user thing in W2K over the past week.)
Jeanie