lifecycle in Win 8 app issue

I have an app Win 8 app with Login on start page. if i switch app and stay there more than 5 secs, when i return back to my app, i am on that login page again. I tried to work with suspend and lounch events, but could not resolve the issue. How can solve it?
nospanovAsked:
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amilie wilsonCommented:
It’s really a strange problem. Win8 lifecycle is common like other application’s lifecycle 5 sec suspension is not a long time to terminate the app. May be it could be happen you have open lots of apps same time that consume Operating System’s lots of memory that’s why system forced to terminate the suspended app.

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