Strange guestbook errors.

I am trying to set up advanced guestbook 2.2.
When I try to modify any of the php files I get the following error messages:

Warning: fopen(./templates/body.php): failed to open stream: Permission denied in /home/neighbor/public_html/guestbook/lib/admin.class.php on line 180

Warning: fwrite(): supplied argument is not a valid stream resource in /home/neighbor/public_html/guestbook/lib/admin.class.php on line 181

Warning: fclose(): supplied argument is not a valid stream resource in /home/neighbor/public_html/guestbook/lib/admin.class.php on line 187

I cant make any changes to these templates ... any help would be greatly appreciated.

chmod your templates 777 with an FTP program

Worked beautifully! Thanks.