DVD or CD Sharing no longer works on one computer

I have a small network of various Macs running 10.6.8.  DVD sharing works fine on all but one.  That one (13" MacBook Pro 10.6.8) cannot find a shared disk on the network (its on the same subnet, all other network services work just fine). Other computers on the network can see any shared disk just fine.
I think the problem may be related to an upgrade to this computer that replaced the optical drive with a second hard drive.  When this computer had an optical drive, DVD sharing was turned on and this computer's optical drive was used by others.  I neglected to turn off DVD sharing before removing the optical drive and replacing it with a hard drive.  Now that it no longer has an optical drive, the DVD sharing option does not even show in System Prefs yet other computers on the network still see this computer as having a shared optical drive.  The other computers just see the "waiting for disk" message if they attempt to connect to the non existent drive.
Just taking a wild guess that the fact that DVD sharing is apparently still running on this computer but there is no optical drive or GUI way to turn it off... may be causing problems with this computer finding shared optical disks on the network?  Is there a command line way to turn off DVD sharing... or a plist file that can be edited?  any other ideas?
Thanks
Bob Smith

found the answer elsewhere.  The 13" Macbook Pro doesn't support shared disk browsing natively (my Mini servers do).  To turn it on on the 13" the following commands do the trick:
defaults write com.apple.NetworkBrowser EnableODiskBrowsing -bool true
defaults write com.apple.NetworkBrowser ODSSupported -bool true
Bob Smith

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