Session value is null after using Sesssion state insert in Sql Server?

I am trying to insert session data in sql server for that i find some solution in internet and used.But the issue is in one page i am setting some value in session and after redirect to another page when i am checking the same session value becomes null, But when i checked in my DB value is stored for that session.in my web.config i have used this session tag with SQLServer mode.But when i am using the previous session tag with that i am able to get session value in another page.Below is the Session tag in InProc Mode.Need help asap.