installed vbseo and entire site is down !!!

hey all, i just installed the vbseo ,and the htaccess file and right after i have uploaded the htaccess file the site went down. I have the following script for the htaccess file where i think i have the mistake
Any help will be appreciated. Thanks

# 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 /forum/

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

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

RewriteCond %{QUERY_STRING} !vbseourl=
RewriteCond %{REQUEST_URI} !(admincp/|modcp/|chat|cron)
RewriteRule ^(.*\.php(/.*)?)$ vbseo.php?vbseourl=$1 [L,QSA]

RewriteCond %{REQUEST_FILENAME} !\.(jpg|gif)$
RewriteRule ^(archive/.*)$ vbseo.php?vbseourl=$1 [L,QSA]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !^(admincp|modcp|clientscript|cpstyles|images)/
RewriteRule ^(.+)$ vbseo.php?vbseourl=$1 [L,QSA]

Hello,

you can remove .htaccess (or upload empty .htaccess) to bring it back.
Replied to your ticket.

this is the 1 i am using now which is not showing the threads at all.

RewriteEngine on
RewriteCond %{HTTP_HOST} ^(www.)?cellphonesmarket.com$
RewriteCond %{REQUEST_URI} !^/forum/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /forum/$1
RewriteCond %{HTTP_HOST} ^(www.)?cellphonesmarket.com$
RewriteRule ^(/)?$ forum/index.php [L]

Replied to your ticket.