Checking for postdata

[eluser]giovannidc[/eluser]
Hey all,

I was trying to check for postdata using the codeigniter library. Normally I would just use isset($_POST['test']) but thought I'd give it a codeigniter try by using:
isset($this->input->post('test')

But that just gives me a server error. Any ideas on how to do it the codeigniter way?