Sub site is redirecting wp-admin to primary site.

Hi Guys

I am having the most frustrating issue ever.

I needed to create another copy of our website so I created the new site and virtual directories in Apache, copied my main sites public_html and imported my main sites database.

After that I edited wp-config.php to point to the correct database.
Then I opened the database with phpmyadmin and changed the 2 records in the wp-options table to point to the new URL.

For some reason when I browse to my new sites wp-admin site I still get redirected to my primary sites wp-admin?

Any ideas?

Thank you.