LG GSA-H55N DVD in My Computer shown as CD-ROM why?

New DVD Drive but its shown as CD drive why?
PC Specs:

PC: Lenovo ThinkCentre xxxxxxx

CPU: Intel Pentium Dual (CPU) E2160 1.8GhZ

BIOS: IBM BIOS Ver 2OKT45.0

RAM: 1022MB

OS: Microsoft Windows XP Professional (5.1 Build 2600) SP2

Graphic: NVIDIA GeForce 8400 GB 512RAM 1024*768 (32bit) (60hz)
LG GSA-H55N DVD in My Computer shown as CD-ROM why

Invest in a CD/DVD Laser Lens cleaner, this fixes most problems with optical drives. If it doesn't help, the drive may be dead.

Update the drivers for your new device, search for what you need in google as windows update doesn't support windows xp anymore since last month.