Weblogic session lost while downloading the excel sheet in web application ?

[Prabhat Ranjan]

Hi,

I am using weblogic server and in web application but while downloading excel sheet (open, save,cancel) , my session is lost to web application.
It is again re-dircetd to login page to login again.

could anyone please let me know what causing this to happen.

some environment or platform related issue or code issue , any weblogic server security setting.