Blank CD-R not writteable?

I’ve been trying to burn some songs into a cd…i have tried with WMP i put the blank CD-R , Start burn then it ejects and says please insert a Writteable CD-R…wth? i also tried with CDBurnerXP, samething. idk what to do none of my blank CD-R’s work wth…lol

Are these CD-Rs colored in any way on the bottom (burning) side?

the cds are different colors on the top side (side u write on)lol butno the buttom part is just like any other Cd…