Clowd, it isnt suppose to read them.
Pop them in, let them spin, it should say disk read error, its a blank disk. Nothing is even on it. Try it about 10 times, then try a game, if it doesn work, get a can of air and blow it inside the ps2.
Try it alot of times, before opening it. Its risky, but it worked for me. I recommend not doing it though.