I didn't know where in the old thread (at http://moodle.org/mod/forum/discuss.php?d=78150#p347922) to put this, even though it's rtelated somehow, so I've started again.
I got an error message from by my installation which read:
"Your site configuration might not be secure. Please make sure that your dataroot directory (/home/phoenx/public_html/develop/uploaddata) is not directly accessible via web."
I didn't seem to be able to access it from the web using: www.phoenixchange.com/develop/uploaddata
But, as there was an error message, I thought I'd better be sure, so I asked my host. They replied:-
"http://phoenixchange.com/develop/uploaddata would be the correct URL to visit. I see it throws a 500 error, but the directory has 755 permissions which are web-accessible. I changed the permissions of the directory to 444. If the warning is still present, please provide me with a URL where I can view the error if possible and I will further investigate."
But now accessing my site generates the following message at the top of the page (using Firefox anyway):
"Warning: fopen(/home/phoenx/public_html/develop/uploaddata/.htaccess) [function.fopen]: failed to open stream: Permission denied in /home/phoenx/public_html/develop/lib/setuplib.php on line 127
Warning: mkdir() [function.mkdir]: Permission denied in /home/phoenx/public_html/develop/lib/setuplib.php on line 138
ERROR: Could not find or create a directory (/home/phoenx/public_html/develop/uploaddata/cache)