Issue with cookies

[eluser]Unknown[/eluser]
Hi igniters! I'm starting with CI and I got an issue with cookies (on v. 2.1). I set cookie using cookie helper function set_cookie, it looks like this:

Code:

set_cookie('permanentLogin', $id.":".$token, strtotime('+1 month'));

Cookie is set, I can access it, everything is fine, but only for actual browser session. If i close it and open it again then cookie is lost. If i vardump $_COOKIE array i see only key 'ci_session'.

Any idea how to fix it? It will be realy helpful ... thx guyz