Guys, If I m not mistaking, vachas007 is reffering player as Car CD Player.
This problem is very common on those CD players

(Plz Don't mind...) Even if u own a branded CD Player, they all use same chipsets.
U have 2 rename the folders as 00Metallica 01IronMaiden. Also, rename the songs as 01Master Of Puppets, 02I_Dissappear etc.... U can also try to set priority to high in file properties 4 ur favorite ones.
B.T.W, I m also metallica fan. I like I dissapper...