Not sure I understand what you mean? Do the discs you made no longer play? If so, do they play in your PC? To see what the discs look like I would download CDSpeed and scan the disc, this will show you if there is any errors on the disc.
If the disc is error free you could try reburning it using something like CloneCD.
One other thing, what media are you using? CDSpeed on the disc info tab will tell you.