new computer wont boot from disk

[Matt234123]

Ok i bought alllll the parts to my computer and put it all together but now when i turn it on and insert the Windows 7 RC DvD that i made it this appears on the screen:

Verifiying DMI Pool Data..............
DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER

well i tried pressing enter still doesnt work
and i tried making another boot CD that did not work either

 

[Matt234123]

nvm i fixed it. it was booting from the harddisk before the DVD drive stupid...went into the bois and changed it