plain password in authenication fail, why?????

I use plain text password in apache authenication and it still fail. I
exhausted my method.
I also defined auth_module in apache.conf

LoadModule auth_module modules/mod_auth.so

Would folks help me ??
why ????


jennifer.




===== setting in httpd.conf===================
<Directory "/var/www/html/redhat7.1">


#
# This may also be "None", "All", or any combination of "Indexes",
# "Includes", "FollowSymLinks", "ExecCGI", or "MultiViews".
#
# Note that "MultiViews" must be named *explicitly* --- "Options All"
# doesn't give it to you.
#
########### 18th July 2001
Options Indexes Includes FollowSymLinks

#
# This controls which options the .htaccess files in directories can
# override. Can also be "All", or any combination of "Options", "FileInfo",
# "AuthConfig", and "Limit"
#
######mark this line AllowOverride None
######
### added this line 18th July 2001

AllowOverride AuthConfig

#
# Controls who can get stuff from this server.
#
Order allow,deny
Allow from all

</Directory>


.....

....

# AccessFileName: The name of the file to look for in each directory
# for access control information.
#
AccessFileName .htaccess

#
# The following lines prevent .htaccess files from being viewed by
# Web clients. Since .htaccess files often contain authorization
# information, access is disallowed for security reasons. Comment
# these lines out if you want Web visitors to see the contents of
# .htaccess files. If you change the AccessFileName directive above,
# be sure to make the corresponding changes here.
#
# Also, folks tend to use names such as .htpasswd for password
# files, so this will protect those as well.
#
#########<Files ~ "^\.ht">
# Order allow,deny
# Deny from all
#</Files>



================= in target directory ========
AuthName "eNO ENTRY SW 7.1 2001 "

AuthType Basic
AuthUserFile /home/jenny/apache/pass
###.htpasswd
<LIMIT GET POST PUT>
require valid-user
#require user reader jenny

</LIMIT>
=============================

[root@worldcn apache]# ./htpasswd -c -p pass jenny
Warning: storing passwords as plain text might just not work on this platform.
New password:
Re-type new password:
Adding password for user jenny
[root@worldcn apache]# cat pass
jenny:a
[root@worldcn apache]#

You might find some help here:
http://www.apacheweek.com/features/userauth

thanks!!!