LG Supermulti DVD+R/-RW/CD-R/-RW drive

I just installed an old new (2005) CD/DVD drive for myself. It is geting power from the power supply but my OS (12.04, tuned with kubuntu-desktop) dosn't recognise it. Now that I tested neither of my drives work (Previously the DVD ROM drive worked well.).
I have beeen trying with a DVD, and CDs aren't read either. I cxonnected the old one to the same IDE cable's other connector and found a similar power connector. HElp me!:popcorn:
EDIT= FYI I am on a desktop, I just selected the forum that was about H/W.