Failed to load module "canberra-gtk-module"

Hello,

we have an Red Hat 5.8 distribution on ours production servers.

We encounter the following error when we execute a script :
Gtk-Message: Failed to load module "canberra-gtk-module": libcanberra-gtk-module.so: cannot open shared object file: No such file or directory

We download all the 5.8 DVDs (server, workstation and client) and none of them contains rpm like canberra or canberra-gtk-module.
And we did not manage to find the missing library on the net.

Could you tell us where we can find this library ?

Thank you !