Problema with menu_master()

[cumbe]

Hello;
I have installed Zegnåt’s multi-level navigation. (Thanks Zegnåt’s by you work!!!)
I have this problem:

Warning: Missing argument 1 for menu_master(), called in .../theme/Cardinal/template_entrar.php on line 35 and defined in /.../plugins/zegnat-multilevelmenu.php on line 74

and I do not know because it happens.

I have used this function other time, and i have not had this problem. Normally i´m writing the following in the template:

Code:

<ul id="subnav">
                            <?php menu_master(); ?>
            </ul>

but now i have this problem....

Regards