Problem doing Creating Tables with Plugins Tutorial

Hey all…I’m trying to write a plugin that will create and fill some mysql tables and I’m testing it out by going through the Creating Tables with Plugins tutorial. I have an install.php file that contains everything copy and pasted from the code under “The Whole Function” section, and have a plugin file that only does add_action('activate_plugindir/pluginfile.php', 'jal_install');

When I activate the plugin, I get the following error

Warning: call_user_func_array(): First argumented is expected to be a valid callback, ‘jal_install’ was given in /home/litscher/public_html/testblog/wp-includes/plugin.php on line 123

This is a fresh WP 2.1.2 install with no other plugins activated and the default theme. Any help would be greatly appreciated. Thanks.