Hello! I have a problem. In my web application I use Ajax components from OboutInc, Oracle DB, and FormsAuthentication with ticket. Where are some buttons that calls asynchronous CallBack and refresh of Update Panels. After clicking on these buttons 17 TIMES!!! Session dies (delete all variables stored in Session object, new SessionID and etc.) What's wrong?
SessionState settings:

mode="InProc"
useHostingIdentity="true"
cookieless="UseCookies"
cookieName="ASP.NET_SessionId"
regenerateExpiredSessionId="true"
timeout="50"
/>
Thank you for nay help, and sorry for my bad English...