It's possible that you don't have a burner in your iBook. Do the following:
Go to the Apple menu at the top left and select "About This Mac"
When the "About This Mac" windows pops up, click on the "More Info..." button (this will bring up the System Profiler)
Once in System Profiler, highlight the "ATA" section and see what is listed as the optical drive. If it says that you have a CD-ROM or just a DVD-ROM, then you don't have any burning capabilities.
Depending on the version of your OS, it will ask about burning differently, but you should be able to change how it asks in System Preferences. Also, note that you can burn CD-R CD-RW, not CD+R or CD+RW
Depending on the version of your OS, it will ask about burning differently, but you should be able to change how it asks in System Preferences. Also, note that you can burn CD-R CD-RW, not CD+R or CD+RW
I've never seen CD+R/+RW in my life. The only time I've seen the "+" sign is with DVD+R/+RW writers. Most DVD burners can support both formats (+ and -).