my $req = POST 'https://adwords.google.com/select/main',
             ['login.userid'   	=> 'test@test.com', 
              'login.password' 	=> 'testabc',
			  'cmd' 			=> 'LoginValidation',
			  'login'			=> 'Login'
             ];
$req->referer("https://adwords.google.com/select/");

my $req = HTTP::Request->new(GET=>'https://adwords.google.com/select/main?cmd=CampaignManagement&campaignid=0&timeperiod=simple&timeperiod.simpletimeperiod=today');
$req->referer("https://adwords.google.com/select/main");

##</code><code>##

Client-SSL-Warning: Peer certificate not verified

##</code><code>##

Your session has expired. Please return to the AdWords Select homepage and login again. 

(This is a security precaution to prevent someone from gaining access to your account if you forget to log-out.)