Problem to install

[inside7777]

Hello,
i start installation http://www.mysite.it/admin/install.php , i removed the file .htaccess, but in the browser read

Fatal error: Call to undefined function: mb_eregi() in /web/htdocs/www.mysite/home/includes/config.php on line 109

Why?

Sorry but i dont speck english

Very tnks

[totobeloeil]

I think you have to uncomment this line in php.ini :
;extension=php_mbstring.dll

to uncomment it, remove the leading ';'