I created a new blog and I am redirected to pay for upgrade.

Hi,

Testing out my multisite install with the 'Pro Sites' plugin. I created a new blog and I am redirected to the upgrade page. It says like this,

"You must pay to enable your site. Please choose your desired plan then click the checkout button below." With the pricing tables.

I can't find in the 'Pro Sites' settings for new blog registration to automatically point them into the free account.

Please help.

Thank you!