pear install HTTP_Download-1.1.2.tar 出错了,请高人指点小弟

C:\Documents and Settings\Administrator>pear install HTTP_Download-1.1.2.tar
PHP Warning:  Module 'mbstring' already loaded in Unknown on line 0
Did not download optional dependencies: pear/Archive_Zip, pear/MIME_Type, use --
alldeps to download automatically
Did not download dependencies: pear/HTTP, use --alldeps or --onlyreqdeps to down
load automatically
pear/HTTP_Download can optionally use package "pear/Archive_Zip"
pear/HTTP_Download can optionally use package "pear/MIME_Type"
pear/HTTP_Download can optionally use PHP extension "mime_magic"
pear/HTTP_Download can optionally use PHP extension "pgsql"
pear/HTTP_Header requires package "pear/HTTP" (version >= 1.3.1)
pear/HTTP_Download requires package "pear/HTTP_Header"
No valid packages found
install failed


请问问题出在那里啊.谢谢各位了!

pear/HTTP_Header requires package "pear/HTTP" (version >= 1.3.1)
pear/HTTP_Download requires package "pear/HTTP_Header"
呵呵。这个问题小弟已经解决。原因是pear里面的包有些是相互继承，
安装HTTP_Download 需要先安装 HTTP 和HTTP_Header 包。
才能安装成功！呵呵

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不过建议你把完整安装放上来，很多新手配置PERL都问题多多