Installing Disk not reading >.>Follow

i know this is like a tech support forum and i dont know if this relates to that, but i got my computer hardrive deleated cause we had a problem with the H drive so i just was going to reinstall FFXI. so i pop in the FFXI 4 disk thing that has FFXI and Rise of zilart and i installed POL thing that took me like 10 hours to install and now i put in my CoP and its not reading when it did before.... same with ToAU like my computer dosnt read them when they worked before perfectly. im kind of a computer idiot so this is kind of annoying me lol