【PHP】pearアップグレードできない件

CentOS4.4でパッケージインストールされるpearはバージョンが
1.3.2であるため，単純にupgrade PEARでは以下のようなエラーがでてアップグレードできない．

requires package `PEAR' >= 1.3.3
PEAR: Dependencies failed

そこで，一度PEAR-1.3.6にアップグレードしたのち，upgrade する．
#pear upgrade -o http://pear.php.net/get/PEAR-1.3.6.tgz
downloading PEAR-1.3.6.tgz ...
Starting to download PEAR-1.3.6.tgz (106,880 bytes)
.........................done: 106,880 bytes
Optional dependencies:
'xmlrpc' PHP extension is recommended to utilize some features
upgrade ok: PEAR 1.3.6
# pear upgrade -o PEAR
downloading PEAR-1.4.11.tgz ...
Starting to download PEAR-1.4.11.tgz (283,272 bytes)
..........................................................done: 283,272 bytes
skipping Package 'pear' optional dependency 'XML_RPC'
skipping Package 'pear' optional dependency 'PEAR_Frontend_Web'
skipping Package 'pear' optional dependency 'PEAR_Frontend_Gtk'
skipping Package 'pear' optional dependency 'PEAR_Frontend_Gtk2'
Optional dependencies:
package `PEAR_Frontend_Web' version >= 0.5.0 is recommended to utilize some features.
package `PEAR_Frontend_Gtk' version >= 0.4.0 is recommended to utilize some features.
package `PEAR_Frontend_Gtk2' version >= 0.1.0 is recommended to utilize some features.
upgrade ok: PEAR 1.4.11