I am trying to create a child portal under an already installed version of dnn.  All works well until I connect to my portal from a different machine, and log into my new portal as the portal administator.  When I log in to my portal as admin, and I try to add something such as a module.  I get booted out and end up back at the log in page.  This problem is temporarily fixed if I log into the portal as host, and then log out and log in to the portal as admin, from the same machinne that I just logged in as host on, but this only fixes the problem temporarily and I have the same problem agin in a couple days.  I am currently using dnn 4.0.3.  What is the cause of this problem

Thanks

Mike