Nigel,
Thanks for your message, the most likely reason for this is .httaccess. Could you please upload .httaccess file that comes with boss cart to your root folder, it should solve the problem.
If you still need assistance, please let us know.

Well, this issue could have many causes. These are some of the options which could help to solve this:

• Try to define the Rewrite base with this code
  RewriteBase /
  after the line which says RewriteEngine on
• It is possible that the Apache server has different configuration so it is necessary to start the content of the .htaccess with this code
  Options +Indexes
  Options +FollowSymlinks
• I can imagine the in the httpd.conf file the deny option is not allowed, hence you need to remove these security related lines from the .htaccess file
  
  <Files configuration.php>
  deny from all
  </Files>
  <Files link.php>
  deny from all
  </Files>
  <FilesMatch "\.(htaccess|inc|tpl|h|ihtml|sql|ini|conf|class|bi n|spd|theme|module|exe)$">
  deny from all
  </FilesMatch>

If none of the option will work please send me a pm with the frp account details and i will check your script.
Thanks

Great I have altered the htaccess file with

RewriteBase/

after the line which says RewriteEngine on

and it all works fine

Thanks

This is great. Have a happy using!