dvd install woes

Just wondering if anyone else out there having install woes with dvd disks. I put one dvd in an booted the machine an it told me it was the 64 bit dvd so i put in other dvd disk an it will not boot from it. I'm booting from a lg dvd writer. the 8x version forget model number off the top of my head. have an asus a7v333 motherboad. it seems to boot off the the cd an i see the installation choices from the cd. thanks jack