help

[sam1]

I try to watch dvd movies in my PC, some play and the other not. I download ffshadow , XP codec package, Divx and nothing work. PC give me a message that the CD may need to be formatted or insert a cd . I notice that CD that does not work has gold like reflex and the one that work has silver like reflex.
can some please help me.

Thanks
XP
Intel 4 2.4GH
Nivada Card 128 RAM