Mapped Domain just forwards to root domain

I know this has been asked a few times, but I can't find the right answer.

I have a parked domain at Godaddy.com which is http://www.modernmusicteachers.com with A name set at @ and pointing to 50.87.22.173

I have the domain mapping plugin settings on "Domain Entered by the User"

I can't get the mapped domain to forward to the right sub-site which is http://www.myproz.com/test2/

When I type in http://www.myproz.com/test2/ that also goes to the main domain now which is http://www.myproz.com

What am I missing?

Also, when I type in the mapped domain of http://www.modernmusicteachers.com, I want it to stay that way in the URL instead of changing to myproz.com/test2 if I can ever get it to work.