Logon popup appears after a while in the portal

Hi,

I have a SAPUI5 application inside my 7.4 portal iView. When we login to the portal we have access to the application. if I wait a while (depending on the timeout parameter), when I try to use the application, the Frontend server Logon popup appears.

What I would like to have is something like Webdynpro behavior. I mean, I do not want to logon again, but just by clicking on the iView link the portal should send the logon cooky to the Front end server.

My Landscape is : Portal --> Front-End Server --> Backend server

Kind Regards