session time to live, how to encrease

hello!

after installation I have session time to live aproximatly 4 min.
how can I encrease session time live?

The timeout property of the forms authentication settings in web.config. See http://msdn.microsoft.com/en-us/library/aa480476.aspx for more information.

Thank you for answer!

in my web.config i have configured 43200 min delay in form authentication + slidingExpiration option set true
<forms name="NOPCOMMERCE.AUTH" loginUrl="~/Login.aspx" protection="All" timeout="43200" path="/" requireSSL="false" slidingExpiration="true" defaultUrl="~/default.aspx" enableCrossAppRedirects="false"/>

also in session configuration timeout option set for 20 min
<sessionState timeout="20" mode="InProc" cookieless="false"/>

but, I have no idias why my session time live is only about 4-5 minutes, more over simetimes it less than 4 min.

I will be very gratfull if you could send "OK" web.config file solving a problem described above.

Thanks once again,

Dmitry