After Domain Mapping Set-Up, template error

I think I am making progress here with the Domain Mapping plugin. I did all the things asked in the dashboard so there are no more messages. I then parked the domain in my cpanel and it said it had been done successfully, yet when I navigate as a Super Admin to see all the sites and then choose to visit their dashboard I am redirected to the login page for that domain I mapped. I log in and I now am able to access the dashboard no problem but if I travel to visit the website I get this error message:

Template Error: The template file must be given (or the template could not be opened)

I notice that the url path is:

http://www.mappeddomain.com/cgi-sys/defaultwebpage.cgi

Any ideas what i might be doing wrong so I can get this fixed? Thanks