Frame Problems

[T Cordon]

I have 2 different servers, one a web server tunning an asp site ( nost
apsx ) and another one, running a web app that gives info to logged users.

I want to call the application from the web page and run it in a frame, so
it feels like it is in the same place with the same appearance, but when the
login page is displayed, and the user logs in i get the same login page
again.

The code in the cmdLogin button goes something like this:

If ValidateUser(txtUsername.text, txtPassword.text) then
Session("LoggedIn")=True
Response.Redirect("DataMenu.aspx")
endif

But DataMenu.aspx never gets displayed inside that frame, i get the login
form again. If I run it from the original source ( outside the frame ) it
runs OK.

Note: I am using iFrame for this

Please Help.

Thanks