xml error

I'm getting the same I believe... Using Drupal 5.1, I see a couple of messages at the top of my screen after enabling the module:

"The directory files/tmp/drupal_gsitemap has been created."
"Unable to load site map. Make sure your temporary directory exists and is writable by Drupal."

But then I cannot see the sitemap:

XML Parsing Error: no element found
Location: http://namke.com/sitemap.xml
Line Number 1, Column 1:

This seems to be a very common problem, but simply renaming directories does not help (I've tried a top level directory too).

Status report says:

Configuration file	Protected
Cron maintenance tasks	Last run 21 min 4 sec ago
You can run cron manually.
Database schema	Up to date
File system	Writable (public download method)
MySQL database	4.1.11
PHP	4.4.2
Unicode library	PHP Mbstring Extension
Web server	Apache/1.3.33 (Unix) mod_fastcgi/2.4.2 mod_gzip/1.3.26.1a mod_python/2.7.10 Python/2.2.2 mod_webapp/1.2.0-dev mod_perl/1.29 PHP/4.4.2 FrontPage/5.0.2.2635 mod_ssl/2.8.22 OpenSSL/0.9.7e

Incidentally, I have another site, hosted by the same company, on which gsitemap works perfectly...

Status report:

Configuration file	Protected
Cron maintenance tasks	Last run 6 min 49 sec ago
You can run cron manually.
Database schema	Up to date
File system	Writable (private download method)
MySQL database	4.1.22
PHP	5.2.1
Unicode library	PHP Mbstring Extension
Web server	Apache/2.0.59 (FreeBSD) mod_fastcgi/2.4.2 mod_python/3.2.10 Python/2.4.3 PHP/5.2.1 with Suhosin-Patch mod_ssl/2.0.59 OpenSSL/0.9.7e-p1 mod_perl/2.0.3 Perl/v5.8.8

So, lots of 'newer' stuff :-(

Duplicate of issue 144166. The error message is Firefox's response to an empty site map.