error 500 on seperate domain after vbseo install

I installed vbseo to my server and it seems to have caused a conflict with another domain on the same server.

I believe it could have something to do with the htaccess file. Perhaps someone else knows whats going on.

The domain I installed vbseo for is ROIC Message Board :: Phil Town Warren Buffett Benjamin Graham Value Investing

The domain that seems to be affected is www.dillybob.com
Notice the 500 error? What would cause that?

Here is my .htaccess for reference

# 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 /

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

RewriteCond %{REQUEST_FILENAME} -f
RewriteCond %{REQUEST_FILENAME} (admincp|modcp|clientscript|cpstyles|images)/
RewriteRule ^(.*)$ $1 [L]

RewriteCond %{REQUEST_FILENAME}index\.php -f
RewriteRule ^(.*)$ $1index.php [L]

RewriteCond %{QUERY_STRING} !vbseourl=
RewriteCond %{REQUEST_FILENAME} !chat
RewriteRule ^(.*\.php)$ vbseo.php?vbseourl=$1&%{QUERY_STRING} [L]

RewriteRule ^$ vbseo.php?vbseourl=index.php [L]
RewriteRule ^(archive/.*)$ vbseo.php?vbseourl=$1&%{QUERY_STRING} [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)$ vbseo.php?vbseourl=$1&%{QUERY_STRING} [L]

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

RewriteCond %{HTTP_HOST} ^rule1forum\.com$ [NC]
RewriteRule ^(.*) http://www.ruleoneforum.com/$1 [L,R=301]

Hello Justin,

please make sure that your host supports mod_rewrite module and allows rewrite rules in .htaccess.

My server does support the mod rewrite. The rules/conditions I have set up for my primary domain on the server (ROIC Message Board :: Phil Town Warren Buffett Benjamin Graham Value Investing) work just fine.

Its the www.dillybob.com thats no longer working.

Please open a support ticket with ftp access for troubleshooting. In the meantime, you can remove .htaccess to get your site working.