Bookcase channel script

I have a number of bookcase and a script that when clicked will show a drop down menu of the books I have. For some reason, I click on one bookcase and I see the drop down menu for two different bookcases. Someone told me I needed to set different channels for them.

Does any one have a bookcase script that solves this?

Thank you ahead of time

The boocase scripts you have now are no-mod? 'cause if they're mod it's easy to fix this... just look for the llListen and llDialog lines and change the number that's shared between them.