Creating new sites on network problem?

I'm setting up a new multisite. Tried to add site from network admins dashboard.

Site shows up in the list of sites, but when I try to go to it's dashboard or visit the site, it's not found???

I have Pro Sites downloaded but not activated. Had that problem on another site. Even the network admin couldn't add an unpaid site. Though I could credit it AS PAID for up to 3 years.

What might be the problem?

I was thinking that I might not of set it up right, but why would it "SHOW" in the list of sites, if when I set up multisite fuction, I missed something in the settings?

Then I thought that it might be the hosting. I have another multisite set up AND working on the same hosting reseller account.

Any thoughts on what to check before I delete it and start it over?