Infopath 2010 Web forms on Sharepoint 2010 keep timing out

I have changed the session state and data connection time outs to 48 hours.  My infopath web forms keep timing out if someone waits too long.  I have a lengthy Performance Evaluation form in Infopath and users pause to answer the phone or get distracted with other things and when they go back to the form it times out and they have to start over.  This is very bad since a performance review can contain lots of text that they have to reenter every time.

Is there someplace else other than central administrator, infopath form services to change these values?  Does it require a reboot of the server to take effect?

Please help...