Hifi won't play cdr's after OS and software change

Running Windows 98 using Easy CD Creator 4 with my Yamaha 4416S
burner, my three HIFI CD players (Technics 8 years old) (Panasonic 6
years old) (Sony 2 years old) would play ALL burned music CD's using
Sony, TDK, BASF and Verbatim media.
Upgrading to Windows 2000 Pro I had to switch to Nero Burning as Easy
CD Creator 4 wouldn't work. Now I find using the SAME media any NEW
stuff I burn won't play in the older (Technics & Panasonic) players.
The Sony player has no problems.
They all still play the CDR's I burned previously. I tried using
Musicmatch software to burn the CDR's but still have the same problem.
I also tried burning at a slower spedd (2X) but it makes no
difference.

Any ideas?

Thanks