李斯特音乐厅:绑定域名时出现的问题

我在空间的控制面板绑定我的域名www.backpackerchina.com之后，又到域名管理器将A记录指向空间要求的IP地址，可是输入我的域名之后看到的是
Warning: main(./extension.inc) [function.main]: failed to open stream: No such file or directory in e:\backpackerchina_arqmrasu7qan30u28stehs3kx4adsrnv\wwwroot\index.php on line 25

Warning: main() [function.include]: Failed opening './extension.inc' for inclusion (include_path='.;C:\php5\pear') in e:\backpackerchina_arqmrasu7qan30u28stehs3kx4adsrnv\wwwroot\index.php on line 25

Warning: main(./common.) [function.main]: failed to open stream: No such file or directory in e:\backpackerchina_arqmrasu7qan30u28stehs3kx4adsrnv\wwwroot\index.php on line 26

Warning: main() [function.include]: Failed opening './common.' for inclusion (include_path='.;C:\php5\pear') in e:\backpackerchina_arqmrasu7qan30u28stehs3kx4adsrnv\wwwroot\index.php on line 26

Fatal error: Call to undefined function: session_pagestart() in e:\backpackerchina_arqmrasu7qan30u28stehs3kx4adsrnv\wwwroot\index.php on line 31

这是怎么回事呀？