Form Error on Post

[eluser]joergy[/eluser]
The Error is typical for a failure due to "Cross-site request forgery (CSRF)". See Security Class for details.
But I'm not sure if this is the reason. On a first glance I don't see an error but that one:

echo $keyword;
$this->load->view('childsearch');

You can't successfully load a view AFTER You've made some output with echo.