function display_private_message_button() {

    if( bp_get_member_user_id() != bp_loggedin_user_id() ) {

        //bp_send_message_button();
        ?>
        <div id="send-private-message" class="generic-button">

            <div class="private-message-button generic-button" ><a href="<?php echo filter_message_button_link(); ?>" class="button small secondary radius" rel="add"><i class="icon-envelope"></i></a></div>
        </div>

        <?php
        add_filter('bp_get_send_private_message_link', 'filter_message_button_link', 1, 1 );
        }
}
add_action( 'bp_directory_members_item_last', 'display_private_message_button',9999 );