Stuck on scheduling and cron

Hello everyone,

I got stuck on scheduling in WP and cron jobs. I need to set a 10min event that calls a function in my class. Basically so far I have a function in the class that does this:

private function configureExporter() {
		$this->cronActivation();

		add_action('cron_exporter', array(&$this, 'cronExporter'));
	}

private function cronActivation() {
		if ( !wp_next_scheduled( 'cron_exporter' ) ) {
			wp_schedule_event(time(), 'hourly', 'cron_exporter');
		}
	}

public function cronExporter() {
		// demo, file export, update_option(...)
}

My Exporter function isn’t called. I prefer the ‘hourly’ option to be set by myself for test purposes, but I didn’t find a way.

Any tips on when I could be wrong?