No wonder you are having problems. See, there's a big difference between older CDR media and newer media. Most older media was dark green, now it's mostly very light greenish silver-like.
Also there are different dye formulations among different manufacturers. In fact most CD-R drives keep getting new ROM updates to keep up with different media formulations.
Newer CD-R drives have been tweaked to work well with most new media. If you take an old dark green CD-R it won't work well on a new CD-R burner. New media may not burn well at all on old burners.
This means that old burners either need a Flash ROM update if one is available or they may be totally useless if you can't find compatible blank media.
Also be careful to verify that what you are writing is written well using something like Nero CD Tool's CD-Speed. This will ensure that all data can be read and show you the writing quality. It's best to read the CD on a reader--not the original writer.
You can easily burn CDs which may look ok, but will not be fully readable!!! Old writers tend to have this problem! Be careful!