Another dashboard loading problem…

Hello all,
Sorry for bothering, but after hours of searching I can’t seem to get my multisite working right. I have the domain decinteriors.com, and made the multisite subdomain trulybeautiful.decinteriors.com through wordpress. I followed all instructions, and also added a wildcard domain at my host (hostgator). Only problem is that when I click on the new subdomain, I receive a blank page. Anyone know what my problem could be?
By the way i’m super new at this, so go easy on me ?? THANK YOU!

Here is my .htaccess file contents:

# BEGIN WordPress
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).*) $1 [L]
RewriteRule ^(.*\.php)$ wp/$1 [L]
RewriteRule . index.php [L]

# END WordPress