The deprecated function used for register the widget may produce some errors depending by the used theme in WordPress:

*Notice*: load_plugin_textdomain was called with an argument that is
*deprecated* since version 2.7 with no alternative available. in
*/is/htdocs/wp10619174_FSVJUF5M39/hgmg/wp-includes/functions.php* on
line *3553*

*Notice*: register_sidebar_widget is *deprecated* since version 2.8! Use
wp_register_sidebar_widget() instead. in
*/is/htdocs/wp10619174_FSVJUF5M39/hgmg/wp-includes/functions.php* on
line *3467*

*Notice*: register_widget_control is *deprecated* since version 2.8! Use
wp_register_widget_control() instead. in
*/is/htdocs/wp10619174_FSVJUF5M39/hgmg/wp-includes/functions.php* on
line *3467*

*Notice*: register_sidebar_widget is *deprecated* since version 2.8! Use
wp_register_sidebar_widget() instead. in
*/is/htdocs/wp10619174_FSVJUF5M39/hgmg/wp-includes/functions.php* on
line *3467*

*Notice*: register_widget_control is *deprecated* since version 2.8! Use
wp_register_widget_control() instead. in
*/is/htdocs/wp10619174_FSVJUF5M39/hgmg/wp-includes/functions.php* on
line *3467*