Installing: Can`t detect CD

["Lazarev A.A." <laa@inex-group.ru>]

Hi, good daytime!

I install a  Sarge at SunFire V100
It`s all right until detect and mount CD-ROM.
The installator writes - 

Your installation CD-ROM couldn't be mounted. This probably means     
that the CD-ROM was not in the drive. If so you can insert it and try
 again.                                                                
                                                                       
 Try again to mount the CD-ROM? 

And not detect CD-ROM anyway....

Can I rerolve it problem?

Andrey L.