Pear installer

Hi
       I try install pear in my pc executing the go-pear.bat file in C:\php, but this does not work.
When I try doing double click on this file, the message is:
 
phar "C:\php\PEAR\go.pear.phar" does not have a signaturePHP warning: require_once<phar://go-pear.phar/index.php>: failed to open stream : phar error: invalid url or non-existent phar "phar://gp-pear.phar/index.php" in C:\php\PEAR\go-pear.phar on line 1236
Press any key to continue.....
 
My sistem is windows xp sp2 and php 5.3.2
 
Please, send me information abaut this.
 
Thanks