mysql, php error

I'm pretty new to this...I've set this book example up on my PC and it's fine. I've attempted this on two Macs... Here's the error I get when I try to run the application. What does the error mean? UNHANDLED ERROR on line 84 in /Library/WebServer/Documents/wda2-winestore/index.php. [PHP Error 20050307145950]Error: "Non-static method DB::connect() should not be called statically" (error #2048). [PHP Error 20050307145950]Backtrace: [PHP Error 20050307145950] 0: connect (line 84 in /Library/WebServer/Documents/wda2-winestore/index.php) [PHP Error 20050307145950]Variables in connect (): [PHP Error 20050307145950] GLOBALS is Array [PHP Error 20050307145950] _POST is NULL [PHP Error 20050307145950] _GET is NULL [PHP Error 20050307145950] _COOKIE is Array [PHP Error 20050307145950] _FILES is NULL [PHP Error 20050307145950] _PEAR_default_error_mode is 1 [PHP Error 20050307145950] _PEAR_default_error_options is 1024 [PHP Error 20050307145950] _PEAR_destructor_object_list is NULL [PHP Error 20050307145950] _PEAR_shutdown_funcs is NULL [PHP Error 20050307145950] _PEAR_error_handler_stack is NULL [PHP Error 20050307145950] hostname is 127.0.0.1 [PHP Error 20050307145950] databasename is winestore [PHP Error 20050307145950] username is wineuser [PHP Error 20050307145950] password is w1nes [PHP Error 20050307145950] _SERVER is Array [PHP Error 20050307145950] dsn is mysql://wineuser:w1nes@127.0.0.1/winestore [PHP Error 20050307145950] php_errormsg is var: Deprecated. Please use the public/private/protected modifiers [PHP Error 20050307145950] HTTP_SESSION_VARS is NULL [PHP Error 20050307145950] _SESSION is NULL [PHP Error 20050307145950] template is Object id #1 -James