app embed issue

when I run the app from http://67.132.106.8/dotnetnuke/eis/eis7/ the login page is displayed as below

however when i embed the app in an iframe on the site i want to intgrate it into i get

all logins return to the login page wiht the error "Your session has expired. Please login again."

FYI,the embedd asprunner app is on a different server
Help!

George