[Plugin: SimpleMap Store Locator] locatioin permalinks issue

I use the latest version of simplemap plugin 2.4.4.1 and have issues in the location permalinks webpage. In the simplemap iframe I get this message: <b>Warning</b>: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘Array’ was given in <b>…/wp-includes/plugin.php</b> on line <b>403</b>

Can you tell me if there is a quick fix? I looked into maps.php and found a valid add_action call to be used by wordpress plugins.php — so I have no clue what could have gone wrong. Please help

http://ww.wp.xz.cn/extend/plugins/simplemap/