Conditional Gravatar display

Hi, i don’t know what to do to accomplish the following:

At my Club website, signed up members can choose on their profiles whether they want to show specific information or not (like avatar, email address, phones). I have done this with the Cimy User Extra Fields plugin. In the author template, to show or hide these fields i do it with this:

$privacy = get_cimyFieldValue($curauth->ID, 'PRIVACY_PHOTO');

...

<?php  if((get_cimyFieldValue($curauth->ID, 'PRIVACY_PHOTO', yes))) { ?>
<div id="author_avatar">
<img src="TEMPLATE-URL/images/gravatar.png" />
</div>
<?php } ?>

<?php  if((get_cimyFieldValue($curauth->ID, 'PRIVACY_PHOTO', no))) { ?>
<div id="author_avatar">
<?php echo get_avatar( $curauth->ID, 140 ); ?>
</div>
<?php } ?>

Now, with the Members List i want to do the same, hide the information if the user has selected NO in that element, so that it also doesn’t show in the members list. I tried to add this condition on the members.php but it doesn’t work. I’m thinking it’s the curauth->ID that is wrong here. I’m not an expert in PHP. I really hope this can work out… can anyone help me pleeeaseee? Any ideas?

cheers,
M.

http://wordpress.org/extend/plugins/members-list/