webmail with qmail

[Rahul Torvi <torvir dpsl net>]

Hi all,

I m trying to configure qmail and downloaded and installed all the
required packages. I downloaded horde-imp to use as a webmail. But the
problem is when i enter user name and password it never authenticates
any user. I also tried with squirrelmail and i get the same problem. I m
using courier IMAP running and also i checked it with telneting to port
143 i get no errors. and the apache logs also dont show any errors. I
have installed php 4. but when itype httpd -t i get an error "Invalid
command 'php_value', perhaps mis-spelled or defined by a module not
included in the server configuration" my configuration is as follows 

<Directory /var/www/html/horde/>
Options FollowSymLinks
AllowOverride None
Options Indexes FollowSymLinks
AllowOverride None
Order allow,deny
Allow from all
php_value include_path '/var/www/html/horde/phplib:.'
php_value include_path /var/www/html/horde/phplib/.
php_value auto_prepend_file /var/www/html/horde/phplib/prepend.php3
php_flag register_globals On
php_flag magic_quotes_gpc Off
php_flag track_vars On
</Directory>

can any body please point me what problem it is ???
Thanks in advance 
Rahul T