You need to reset after installing the deb. I have no idea what else might be wrong, or if they are already mounted, which is why I asked what the output of dmesg was since that will give me more information. You need to have the drive attached with a CD already in it when you type the mount commands. If the CD takes too much power, you also need a powered hub. There are other possibilities, but generally dmesg will say if the device is recognized (it will either say something about power or found CD/DVD rom drive or something similar).