Mollom

I have installed the keys, and activated the plug-in, I am suing J1.5.6 with Virtuemart 1.1.2

I used this script

com_virtuemart {
submitTrigger: task=save&controller=entry;
subjectName: null;
bodyName: gbtext;
authorNameName: gbname;
authorUrlName: gbpage;
authorEmailName: gbmail;
authorOpenIdName: null;
authorIdName: null;
formMethod: post;
indexFile: index.php;
blockQualityBelow: 0.3;
}

But nothing happens. When I create a new user with the virtuemart login register new users I don't see any captcha, what am I doing wrong ?