Not sure what the problem was, but I uninstalled, manually deleted the database tables from my database and then reinstalled. Then I just modified the existing sample data instead of adding a new item. It is working properly now.

Also, when editing an item I get this error: Unknown column '1' in 'field list' SQL=INSERT INTO `jos_booking_template_6` (`id`, `1`, `2`, `3`, `4`, `5`, `6`, `7`) VALUES (1, '0', '0', '0', '4-gear man.', '1', '', 'Compact') ON DUPLICATE KEY UPDATE `1` = '0', `2` = '0', `3` = '0', `4` = '4-gear man.', `5` = '1', `6` = '', `7` = 'Compact'

When I click the "make reservation" button from the item list, it shows me the item description, but there is no way to make a reservation. Please help.