Transition Time Problem?

In the following header animation (http://www.freenicetemplates.com/fre...mplate/201.htm), I cannot seem to get the transition time to work through the config.xml file. The transitions are unaffected by adding/changing the line as described in the how-to
(e.g. <!-- transition time (in seconds) between two animation screens -->
<transition_time_seconds>5</transition_time_seconds>)

Thanks