Getting this error messgae popping up following upgrade

PHP Fatal error: Call to undefined function s2member_pro_login_widget() in /myserver/public/wp-content/plugins/ezphp/ezphp.php(82) : eval()'d code on line 32

anyone any idea what this is all about?

ezphp is also a websharks plugin

Error is not in ezphp plugin, but in the code, which that plugin runs, at 32 line of that code. Maybe s2M don’t works in this time? May be disactivated?