#6 problem instaling pear

[Anonymous]

i try to use pear_installer.php to install pear requested by mapstorer.

After I click the install button the instalation starts, but after I receive the messenge: mkdir failed

Starting installation ...
mkdir failed:
Loading zlib: ok
Downloading package: PEAR-stable......ok
Downloading package: Archive_Tar-stable....ok
Downloading package: Auth-stable......ok
Downloading package: Console_Getopt-stable....ok
Downloading package: DB-stable........ok
Downloading package: DB_Table-stable....ok
Downloading package: Date-stable......ok
Downloading package: HTML_Common-stable....ok
Downloading package: HTML_QuickForm-stable....ok
Downloading package: HTML_QuickForm_Controller-stable....ok
Downloading package: HTML_Table-stable....ok
Downloading package: MDB2-stable......ok
Downloading package: MDB2_Driver_mysql-stable....ok
Downloading package: MDB2_Driver_pgsql-stable....ok
Downloading package: Pager-stable.....ok
Downloading package: Structures_Graph-stable....ok
Downloading package: Structures_DataGrid-beta....ok
Downloading package: Structures_DataGrid_DataSource_Array-beta....ok
Downloading package: Structures_DataGrid_DataSource_DB-beta....ok
Downloading package: Structures_DataGrid_DataSource_DBQuery-beta....ok
Downloading package: Structures_DataGrid_DataSource_DBTable-beta....ok
Downloading package: Structures_DataGrid_DataSource_MDB2-beta....ok
Downloading package: Structures_DataGrid_Renderer_HTMLTable-beta....ok
Downloading package: Structures_DataGrid_Renderer_Pager-beta....ok
Downloading package: Validate-beta....ok
Downloading package: HTML_Template_IT-stable....ok
Downloading package: Net_UserAgent_Detect-stable....ok
Downloading package: PEAR_Frontend_Web-alpha....ok
Bootstrapping: PEAR...................(remote) ok
Bootstrapping: Archive_Tar............

Warning: mkdir() [function.mkdir]: File exists in C:\ms4w\Apache\htdocs\mapstorer\documentation\pear_installation\pear_installer.php on line 710

(remote) ok
Bootstrapping: Console_Getopt.........

Warning: mkdir() [function.mkdir]: File exists in C:\ms4w\Apache\htdocs\mapstorer\documentation\pear_installation\pear_installer.php on line 724

(remote) ok
Downloading package: MDB2.............ok
Extracting installer..................
Warning: require_once(PEAR.php) [function.require-once]: failed to open stream: No such file or directory in C:\ms4w\Apache\htdocs\mapstorer\documentation\pear_installation\Archive\Tar.php on line 21

Fatal error: require_once() [function.require]: Failed opening required 'PEAR.php' (include_path='C:\ms4w\Apache\htdocs\mapstorer\documentation\pear_installation/temp/C:\ms4w\Apache\htdocs\mapstorer\documentation\pear_installation\temp\gop1A3.tmp') in C:\ms4w\Apache\htdocs\mapstorer\documentation\pear_installation\Archive\Tar.php on line 21