Multisite new site dashboard not working

Hi all,

I’m attempting to set up a multisite on my wordpress. I followed the guide and everything seems to work great except that when I go to my new site (http://climb-om.travisgarner.ca/) I get a blank page, and when I try to access the dashboard I get a 500 Internal Server Error.

I assume it has something to do with the .htaccess, when I first set up the multisite I couldn’t find the .htaccess so I never changed it. I set up the new site with the original .htaccess. Since then i have changed the .athaccess to read:

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]

# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ – [L]
RewriteRule ^(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^(.*\.php)$ $1 [L]
RewriteRule . index.php [L]

(I am using sub-domains)

Does anyone have any thoughts on why I get the 500 Error?

Thanks

EDIT: Also, it might be useful to know that I installed the multisite on an addon domain. I don’t know if this affects things.