Warning while activation

After I install the last version,many warning message appear at the top of dashboard,like these:
Warning: scandir() has been disabled for security reasons in /home/wwwroot/freewp/wp-content/plugins/s2member/includes/funcs.inc.php on line 23

Warning: Invalid argument supplied for foreach() in /home/wwwroot/freewp/wp-content/plugins/s2member/includes/funcs.inc.php on line 23

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘c_ws_plugin__s2member_translations::load’ was given in /home/wwwroot/freewp/wp-includes/plugin.php on line 403

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘c_ws_plugin__s2member_ssl::check_force_ssl’ was given in /home/wwwroot/freewp/wp-includes/plugin.php on line 403

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘c_ws_plugin__s2member_user_securities::initialize’ was given in /home/wwwroot/freewp/wp-includes/plugin.php on line 403

Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ‘c_ws_plugin__s2member_no_cache::no_cache’ was given in /home/wwwroot/freewp/wp-includes/plugin.php on line 403

How can I fix it?

Great thanks.

Hello Liu,

What happens when you change your theme to the default, and deactivate all your plugins (except s2Member), temporarily? Does the error still appear?

– Eduan