Why appears this message: FATAL: No Bootable medium found!

[capri]

Hello, i have W XP and Virtualbox running Linux Ubunto and work fine, but some days ago i'tried to install Virtualbox for MAC (i have two MAC machines running with Virtualbox and XP inside and it works ok), but in this case, is a laptop and after install virtualbox, put the original CD W XP and when the new machine start to install W X7 from cd appears this message: FATAL: No Bootable medium found! System halted.
There is not option, the system is halted, and a have not idea about this. I've installed other W XP on other laptop but in this case with BOOT CAMP and works ok, but i preffers Virtualbox, ¿ Could anyone help ?, Thank you..

[stefan.becker]

Try making an image of the install cd and use the image instead of the cd.

[Perryg]

Multiple posts are not allowed for the same problem. If you don't receive an answer in few days then bump the original post. Your other posts have been deleted.