CD drive problems

Hi,

I use LG cd writer and LG cd rom drives on the same PC. Since the cd-rom drive is not working anymore, i decided to unplug it from the system. However, after unplugging it, the system only shows 128mb RAM while I use 256mb (2 x 128mb). Is there a way to fix this?

Also, when I use the CD writer to read CD-roms while listening to music, the sound is affected. Seems there is a conflict somewhere, but i don’t exacly know what….

Any solutions????