sitemap not working anymore after upgrade

Hello,
on Baltazar.it :: Forum I upgraded to vbulletin 3.7.x but the sitemap is not working properly. If you try http://www.baltazar.it/sitemap_index.xml.gz you can see the error.
How can I fix it?

Thanks!

Have you CHMODed your data folder to 777?

yes, it's chmoded to 777

Tried to re-upload all files (binary mode) and re-runned the script, but now this error:

vBSEO Sitemap Generator
[SECTION START] member [9,925.6Kb mem used] [474s (+286s)]
[create sitemap file] filename: sitemap_12.xml.gz, number of urls: 20000 [9,930.6Kb mem used] [485s (+11s)]
[create sitemap in text format] part #13 [9,930.5Kb mem used] [485s (+0s)]
[SECTION START] polls [9,949.3Kb mem used] [489s (+5s)]
[SECTION START] blogs [9,994.1Kb mem used] [490s (+1s)]

Fatal error: Call to undefined function vbseo_blog_url() in /home/../public_html/vbseo_sitemap/vbseo_sitemap_functions.php on line 1123

Are you running vBSEO3.2.0 ? (it's require to have Blog URLs supported)

Oh, version updated, thanks

It seems working now