Can't get packageInfo in Apache

Hi all,

I can't get packageInfo of some packages installed on my system(Fedora
Core 3 with bundled httpd and php):

# pear list
Installed packages:
===================
Package Version State
Archive_Tar 1.1 stable
Console_Getopt 1.2 stable
DB 1.7.4 stable
DB_Pager 0.7 stable
HTTP 1.2.2 stable
Log 1.8.7 stable
Mail 1.1.3 stable
Mail_Mime 1.2.1 stable
Net_SMTP 1.2.6 stable
Net_Socket 1.0.1 stable
PEAR 1.3.2 stable
XML_Parser 1.0.1 stable
XML_RPC 1.1.0 stable

I've a simple script to check existing of these modules:
--------------------- cut here -----------------
<?php

include_once ("PEAR/Remote.php"); // PEAR::Remote
include_once ("PEAR/Registry.php"); // PEAR::Registry

$pear = new PEAR_Config();
$pear_reg = new PEAR_Registry($pear->get('php_dir'));
$pear_info = $pear_reg->packageInfo("PEAR");
$pear_version = $pear_info["version"];
print("PEAR Version:" . $pear_version . "\n");
$Log_info = $pear_reg->packageInfo("Log");
if (strlen($Log_info["package"]) < 2) {
print("Can't find Log module\n");
} else {
print("Log module found\n");
}
?>
--------------------- cut here -----------------

It works if passing to php directly in bash. However, some of modules
can't be located using this method (DB and Log) when run it through
Apache. Would anyone pls help? My PEAR config follows.

--------------------- cut here -----------------
Configuration:
==============
PEAR executables directory bin_dir /usr/bin
PEAR documentation directory doc_dir /usr/share/pear/doc
PHP extension directory ext_dir /usr/lib/php4
PEAR directory php_dir /usr/share/pear
PEAR Installer cache directory cache_dir /tmp/pear/cache
PEAR data directory data_dir /usr/share/pear/data
PHP CLI/CGI binary php_bin /usr/bin/php
PEAR test directory test_dir /usr/share/pear/test
Cache TimeToLive cache_ttl 3600
Preferred Package State preferred_state stable
Unix file mask umask 22
Debug Log Level verbose 1
HTTP Proxy Server Address http_proxy <not set>
PEAR server master_server pear.php.net
PEAR password (for password <not set>
maintainers)
Signature Handling Program sig_bin /usr/bin/gpg
Signature Key Directory sig_keydir /etc/pearkeys
Signature Key Id sig_keyid <not set>
Package Signature Type sig_type gpg
PEAR username (for username <not set>
maintainers)
--------------------- cut here -----------------

Thanks a lot.
/ST wong