using an application without repeated logins

Hi.

My users are having to re-login after 30 minutes of inactivity, even though I
1) store session information in an SQL database, and
2) specified my own machinekey.

Can someone tell me what more do I need to do to avoid the repeated logins?

Here are relevant parts of my webconfig:

<authentication mode='Forms'>
<forms name='.ASPXAUTH' loginUrl='CmiLogin.aspx' />
</authentication>

<sessionState
mode='SQLServer'
allowCustomSqlDatabase = 'true'
sqlConnectionString='data Source=sql2k504.discountasp.net;database=SQL2005_83011_fciosession;user id=SQL2005_83011_fciosession_user;password=*****'
cookieless='false'
timeout='720'
/>

<machineKey validationKey='361D2BCE0FD210DC0981E1411B6DF9FEA4D149DE8E3F7CBC3DC83A907FFA232F6095BEE9828EE24E0C4341858EB13F052EBF76C65EAA86F26610FA7F031314A4'
decryptionKey='6DC367577C6D5D9A103D5DF0BA8F601EA52B2A1F082CC332'
validation='SHA1'
/>

 

Here's what I did and it seems to keep my users logged in forhours at a time:


In my login page, I have:


Dim ticket As New FormsAuthenticationTicket(2, strauthCode, DateTime.Now, DateTime.Now.AddHours(12), chkPersistent.Checked, strauthCode)


FormsAuthentication.RedirectFromLoginPage(strauthCode, chkPersistent.Checked)
In my web.config, I have the machine validation key, just like you do but the forms section is different:



<system.web>


<authentication mode="Forms">


<forms name="myApp" loginUrl="Default.aspx" timeout="480" slidingExpiration="true"/>


</authentication>