my very simple guesbook doesn't work

[eluser]TheFuzzy0ne[/eluser]
You can just enable the profiler by putting this into your controller constructor:

Code:

$this->output->enable_profiler(TRUE);

This will (among other things) show you the query that's generated, so you can fire it straight at the database yourself (using the CLI, PHPMyAdmin or whetever else tickles your fancy), and see if you get any results back.