Post your question provided by the other link in my signature (register first at TheTechPub before posting). The assistance you receive there is superior and is mostly done by someone usernamed "Akira". Make sure you list the following when reporting your question:
>Computer model
>Mention you have Mac OS X 10.2.5
>CD-RW model and speeds, as well as the interface
>What you have already tried
Also, try resetting the open firmware (Apple -- Option -- O -- F, then type in reset-all, all on computer startup).
Finally, make sure your firmware is also up to date. Apple will probably have an update available for your model machine on their site.
Do these first in case this does solve the problem. If they do not, visit TheTechPub and post there after registering.