I've tried the Debian Package on Debian Sarge. First, you must have the package lsb-base installed, because the init script needs it, and furthermore the init script needs the function log_daemon_msg which isn't included in the lsb funtions. Therefore the init script fails. You can make it work by creating the function log_daemon_msg yourself, but it's not the clean way.

If you could adjust your Debian packages so that they work on Debian Sarge it would be great! :-)