Sitemaps not generating correctly

I'm not sure what happened or how to fix this. I've tried solutions posted in this board to no avail. The sitemap was generating correctly at some time in the past but now does not. tidefans.com/forums/sitemap_index.xml.gz does not work (404 error). The vbseo_sitemap directories are

tidefans.com/forums/vbseo_sitemap/
and
tidefans.com/forums/vbseo_sitemap/data

I uploaded all files as instructed but is not redirecting to the proper data directories. I loaded sitemap into google as tidefans.com/sitemap_index.xml.gz but on google and in sitemap index file it generates the links to tidefans.com/forums/sitemap_xx.xml.gz . In google, when I click on the link it is (obviously) not found (404 error).

my htaccess in the forum root

Code:

# Comment the following line (add '#' at the beginning)
# to disable mod_rewrite functions.
# Please note: you still need to disable the hack in
# the vBSEO control panel to stop url rewrites.
RewriteEngine On

# Some servers require the Rewritebase directive to be
# enabled (remove '#' at the beginning to activate)
# Please note: when enabled, you must include the path
# to your root vB folder (i.e. RewriteBase /forums/)
# RewriteBase /

#RewriteCond %{HTTP_HOST} !^www\.yourdomain\.com
#RewriteRule (.*) http://www.yourdomain.com/forums/$1 [L,R=301]

RewriteRule ^((urllist|sitemap_).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]

RewriteCond %{REQUEST_URI} !(x|y|z) # directories masked
RewriteRule ^((archive/)?(.*\.php(/.*)?)?)$ vbseo.php [L,QSA]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !^(x|y|z|...)/  #directories masked
RewriteRule ^(.+)$ vbseo.php [L,QSA]

Hello,

You are on nginx.

htaccess doesn't work on nginx.

That file is doing nothing. You need to go into the niginx config file and look for your rules there.

Thanks Brian. I'll look at that config.