You didn’t say how recently you pointed your domain name at FatCow. It can take 72 hours before things work properly, though 12 hours is normally enough with large local Internet providers.
If that is not your problem, then you are going to have to list a URL (link) to your WordPress site, so people here can take a look.
The site has been on FatCow for some time, but only using the basic web editor. I installed WordPress and the template this afternoon.
I will give it some time and try again, if not I can post links.
Appreciate the assistance.
I think you are describing the White Screen of Death. If so, you can take a look here for some ideas:
http://codex.wordpress.org/Common_WordPress_Errors
http://codex.wordpress.org/Debugging_in_WordPress
Especially look at turning on WP_DEBUG
What version is your wordpress?