Why is it a week before vsftpd is verified?

Why is it a week before vsftpd is verified? -- Linux general technology-Linux technology and application information. For details, refer to the following section. I learned how to install redhat as5.0 for a month.
The vsftpd2.0.5rpm package in the CD is used for installation. If everything is done well, the virtual user configuration cannot be used.
It is normal to use the pam db verification without adding the following one, but it won't work if it is added.
/Ect/vsftpd. conf

User_config_dir =/etc/vsftpd_user_conf // define the virtual user configuration file directory
You only need to add this one in it, so it cannot be verified.
I follow the method below to install
@ Step 7: Create the root directory, configuration file directory, and configuration file for each user

# Mkdir/home/vsftpd/test1
# Mkdir/etc/vsftpd_user_conf
# The contents of the vi/etc/vsftpd_user_conf/test1 file are as follows:

Local_root =/home/vsftpd/test1
Write_enable = YES // writable
Anon_world_readable_only = NO
Anon_upload_enable = NO
Anon_mkdir_write_enable = NO
Anon_other_write_enable = NO

# The contents of the vi/etc/vsftpd_user_conf/test2 file are as follows:

Local_root =/home/vsftpd/test1
Write_enable = NO
Anon_world_readable_only = NO
Anon_upload_enable = NO
Anon_mkdir_write_enable = NO
Anon_other_write_enable = NO

# Chmod 700/home/vsftpd/test1

The operations are exactly the same, but they are not very depressing!
I really don't know what's wrong. Please give me some advice!