The School Cancellations component 2.0 build 007 does not have any database functions built yet. Only the default page opens and all that is displayed is the submenu and the copyright in the footer.
The School Cancellations component for Joomla 2.5.x
The School Cancellations component has not been tested in Joomla 1.6 or 1.7. It may or may not work in those versions.
If you are still on Joomla 1.5 you need to download the 1.x series.
If you are still using Joomla 1.0 congratulations you have lasted this long. But you really need to upgrade.