cdrom not recognized

[De Leeuw Guy <G.De_Leeuw@eurofer.be>]

Hello,

I try to install debian etch net-install cdrom, downloaded today.
I can start, choose a language a keyboard language set, but after I have
an error :
cannot discover cdrom

The laptop is a dell latitude D810
The cdrom under XP is : TSSTCorp DVD+-RW TS-L532B

Thanks in advance for your help

Guy