Really Weird Problem

For the past few months, my Superdrive has not been able to burn any DVDs or CDs. It simply failed to recognize any blank CD or DVD, so whenever I would click Burn, it would say please insert a blank CD/DVD.

So today, I was going to go to the Apple Store to have it looked at. I replaced the 4GB of Mushkin RAM that I installed a few months ago with the 2GB of RAM that came with my 2.4ghz MBP. After, I checked the drive by attempting to burn a CD, and of course, it randomly starts working. Because I thought it was the RAM (not sure how) that may have been causing the problem, I put my 4GB back in, and for some reason, it lost its ability to burn CDs/DVDs again.

Why is this happening? How does RAM even affect the burning capability?

This is the memory that I bought.
http://www.newegg.com/Product/Product.aspx?Item=N82E16820146878

I'm using a late 2008 unibody 2.4 GHz MBP.

 

How exactly would I change that?