pear 安装 ，来者有分！

我在C:\PHP下运行go-pear.bat，为什么出现下面的的信息啊？然后回车后就退出了！

phar "C:\PHP\PEAR\go-pear.phar" does not have a signaturePHP Warning: require_o
nce(phar://go-pear.phar/index.php): failed to open stream: phar error: invalid u
rl or non-existent phar "phar://go-pear.phar/index.php" in C:\PHP\PEAR\go-pear.p
har on line 1236

Warning: require_once(phar://go-pear.phar/index.php): failed to open stream: pha
r error: invalid url or non-existent phar "phar://go-pear.phar/index.php" in C:\
PHP\PEAR\go-pear.phar on line 1236
请按任意键继续. . .

请各位指教！