Are you saying the CDs work but you have to launch commands manually? If so, the solution depends partly on your OS. In XP, you can try the following:
Right-click the CD-ROM drive in Windows Explorer and select Properties.
Select the AutoPlay tab.
Select the appropriate autoplay preferences.
If this doesn't work, try this from the Control Panel:
Administrative Tools > Services > Shell Hardware Detection > Return this service to Automatic.
Option 3:
Start > Run > Regedit
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\Services\Cdrom
AutoRun = 1