SIMPLESAML forces every 10 or 15 minutes to session validate with ADFS

[anand...@gmail.com]

Please can someone help me with my problem as i am using SIMPLE SAML with Drupal 7 and i am using my ADFS server as IDP and it sounds like every 15 minutes it forces to re-validate session with IDP server.  As i already checked with my ADFS admin and they told that from ADFS end it's set for 1 hour to check session but i don't know whats causing this issue :-(