how store session data when postaback occur state server

Feb 1 2016 1:20 AM

if i have increses the maximum worker process 5.
and using state server in the web config file i have mention
( <sessionState mode="StateServer" stateConnectionString="tcpip=127.0.0.1:42424" stateNetworkTimeout="100000" />)

but when i using modelpopup for showing some email should send to particular
customer or not then session become null
Enable to get session data after the postback occur