I have 3 cd players in the house and each one of them tells me error when I pop in a cd. I can't figure out why. HELP!!!!!!!

If it is a burned cd (copied, or created on the computer, or other disc copying device)

then sometimes it will not work in some cd players.


If it is NOT a burned CD, i.e. a mass produced CD
then the reason it may not work might be that it is scratched or damaged beyond recognition as a music cd, so your players do not recognize it as a CD.
In that case either try cleaning it or using a scratch repair device such as Disc Doctor.