Thanks for your answer but, unfortunatly, this infomation do not help.
In fact, having searching on the net before posting my message, I found this link and have already look at it.
This is not the same problem. In this case, Linux was install, but did not work properly, then all what is proposed is for linux system.
In my case : Linux cannot boot from the CD, then I do not have a linux OS.
Anyway thanks for your answer...
flafla