Foren / Cotonti / Support / contact us, captcha

the captcha in my contact us plugin won't work.
the verify img is not showing, but when i fill in the form it does say: Wrong code from picture!

captcha manager is installed and running

if ($usr['id'] < 1 && $cfg['plugin']['contactus']['useCaptcha'] == 'Yes'){
	$t->assign(array(	
	"CONTACTUS_VERIFYIMG" => sed_captcha_generate(),
    	"CONTACTUS_VERIFYINPUT" => "<input name=\"rverify\" type=\"text\" id=\"rverify\" size=\"24\" maxlength=\"6\" class=\"text\" />",
	));
	$t->parse("MAIN.CAPTCHA");
}

nvm, got aother captcha to work