[ubuntu] Installing problems

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http://ubuntuforums.org – I am trying to install ubuntu once again because nvidia crashed. My laptop screen is broken so I have to plug in another screen and hope that it will notice it at the very start of the installation. But I haven't even got that far yet because my laptop isn't recognising my cd. I have went into BIOS settings and I can actually change the prioritys of the cd drive usb drives and the likes (which is a miracle because you should see how much of the screen I have left) but the laptop still will not recognise the ubuntu installation disc I made. I also made a usb stick but it won't recognise that ei (Hardware)