i have problem in my forum with mod_rewrite

when i turn on mod_rewrite it says that page not found?

i dint upload .htacces in folder tag because i have only one .htacces and i have done that in linux...and when i add this in htacces

Options +FollowSymLinks
RewriteEngine On
RewriteRule ^(.+)/([0-9]+)/$ index.php?tag=$1&page=$2 [NC,QSA,L]
RewriteRule ^(.+)/$ index.php?tag=$1 [NC,QSA,L]


my forum doesnt work???


is there a problem counterfacing with vbseo?? and why doesnt work

i get this

Server error!

The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there was an error in a CGI script.

If you think this is a server error, please contact the webmaster.
Error 500
CroPortal.net
Mon Nov 20 15:17:27 2006
Apache/2.2.0 (Linux/SUSE)