Firstly please do not type in captials.This is commonly known as shouting and may result in less replies to your question.
Now have you checked to see if you have your os on a partition.Tap F11 on startup,and if you do have the os on the partition you will be given 3 options to recover the machine.
If no partition,you may need to go into the bios and change the boot order.
You say the cd rom is not working ?
Why,do you know why ?
Is it listed in My Computer ?
If you help us with why you think its not working,we may be able to help.