Undefined method Piwik_Common

my piwik worked very well, but it show error:PHP Fatal error: Call to undefined method Piwik_Common::getIpString() in D:\count\plugins\SitesManager\Controller.php on line 53 when I updated to piwik 1.4, I updated it online.
I fount line 53 is:$view->currentIpAddress = Piwik_Common::getIpString();
now please tell me how to correct the error.

Re-upload the 1.4 files.

Piwik_Common::getIpString() no longer exists, so the error message means you still have some old files to update.

it’s ok now, thanks