Page 1 of Help for Philips DVD 730/002

My player doesnt read CD-R--it say "No Disc".
Is that standart,or do I need aspecial brand?
I used 5 different brand and also different burning speeds-
from 1X to 4X--no difference.
As i want to upgrade my very old Firmware( 2.17 )the player have to read CD-R.
All my burned CD have absolutly no problem on my Philips Cd player.
Need Help