Stuck installing ubuntu 12.10 on laptop

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http://askubuntu.com – (initramfs) Unable to find a medium containing a live file system. I get this message from BusyBox v1.19.3 ( Ubuntu 1:1.19.3-7ubuntu1) built-in shell (bash). I don't know what to do if any of you know how to fix this problem please let me know I have install with the same disk on my desktop computer and it worked just fine I don't know why my laptop which is newer does not install it and I burn the disc from the same laptop (HowTos)