CDs not recognised

My DVD drive , since upgrading to Windows 7 I am sure, will not acknowledge that there is a CD in it. DVDs are fine. It is just CDs that arent working. I checked for a driver update and there wasnt one. Is there anything I can do to fix this?

I know this is odd, but try to change your IDE slot
I've had the same issue and this helped me...
And of course, do you have ATA or SATA DVD-ROM?

Thanks for the reply, pretty sure its an ATA DVD-RW.

Name of the drive is, "HL-DT ST DVDRW GSA0H21N ATA Device"

It's ATA...
Did you understand what you need to do?

No, sorry.

Do you mean physical move the drive into another bay?

Yup...
If you are using one ROM as a IDE Master, just change bay on the cable.

In that case I will give it a go. I shouldn't need to worry about frying everything due to static from my hands, should I?

It's better to turn your computer off and unplug it...
Just in case...