HP NC6320 w/DVD RW TSST Corp ts-l632d.Does not recognise Bootable Windows or Linux DVD's

Hi Folks
I have an HP laptop NC6320 with a DVD RW that is TSST Corp ts-l632d . I have tried to repeatedly install Vista Via a bootable DVD or install Linux via bootable DVD but it will not recognize these as bootable and boot from HDD.
Boot order of course is DVD RW 1st , then USB Cd 2nd, etc and Last HDD.
Now when I connect an external USB DVD RW Writer - that one will recognize these DVD's as boot dvds and go into boot menu.
Why does not ts-l632d recognize these as Bootable DVD's and boot.

I also made a bootable rescue CD and even that is NOT recognized as bootable by the DVD Drive of the laptop. External Burner will recognize.

The 2nd problem is that when you boot of an external DVD RW, then Vista gives error that it cannot find Hard Drive - make sure HDD is turned on.

Folks ..Desktop...Laptop Gurus .....need your help here.

Thx
Sam

 

Have you tried using a different type of media? My DVD drive will only boot from DVD+R's, and not DVD-R's. Have you tried both? If not give whichever type you haven't used yet a try.