History of DNN Login Issue
Edit your web.config and update the following nodes to whatever value you require (the approriate fields are identied in bold below - all values are in minutes i.e. 60 minutes*24 hours*14 days=20160).
<forms name=".DOTNETNUKE" protection="All timeout="120" cookieless="UseCookies" />
<add key="PersistentCookieTimeout" value="20160" />
DNN Community Blog