Thanks, Esmi
i reset the permalinks back to default. it works.and I have also review the Using_Permalinks section which you refered, however, it’s kind of confusion. I am not sure if the below information is what you refer to :
“Using “Pretty” permalinks
Requirements:
Apache web server with the mod_rewrite module installed
In WordPress’s home directory,
The FollowSymLinks option enabled
FileInfo directives allowed (e.g. AllowOverride FileInfo or AllowOverride All)
An .htaccess file (if this file is missing, WordPress will try to create it when you activate “pretty” permalinks)
If you want WordPress to update the .htaccess file automatically, WordPress will need write access to the file.”
I am not good at technical staff, i am using window 7, how can I find apache seb server, can you please kindly direct me step by step how to
complete the whole proecss
many thanks