[iojam]

Danny.C,

please check what is around line 515 in vbseo_sitemap_functions.php file in your case.

CP,,
.htaccess file should be located in your vBulletin folder.

cheekymonkey2,
make sure that your host supports mod_rewrite AND allows rewrite directives in .htaccess files.

I can run the script from the scheduler, but google can't access it, as the .htaccess is blocking it. I've tried to remove it, but the problems are still there.

although the files are stored in vbseo_sitemap/data/ folder, you will submit them like http://yourforumsroot/sitemap_index.xml.gz (this is possible with mod_rewrite rules in .htaccess).

Kwak,
you can add only the URLs within your forums folder (other domains are not allowed by google sitemap protocol).

ComputerVitals,
make sure that you DON'T have minutes set to '*' in Sheduled task properties. You should set it to '0' (or other number). Otherwise it will be executed every minute.

siriuxs,
vBSEO Sitemap Generator is not encoded with Zend, so you don't need any additional libraries to be installed at your host. This is probably related to other product you are using. If you mean vBSEO (not Sitemap Generator), please open support ticket at http://www.vbseo.com/support/