navigation emergency aid

Hello friends, I know you have the 2006 model 407 automatic 2.0 hdi sport model, as you know, the original navigation is on top of the vehicle. The rt3 model has navigation CDs in my hand, but it doesn't work anyway.

What exactly is the problem my teacher did not see or read my CDs.

I tried walla, I put a normal CD, music is playing, but neither reads nor accepts the navigation CDs in my hand.

Well, if my teacher CDs are very scratched, he cannot read it, have a check or there may be a problem with the reader. Let's see if you can put an image or video would be nice.