title: Paypal cancel subscription created via paypal standard subscription button
body: <p>I use paypal standard subscription button for manage subscription system in my site
  I configure ipn i got 2 ipn notification with txn_type <strong>subscr_signup</strong> and <strong>subscr_payment</strong> and i have <strong>subscr_id</strong> param there also.
  So i have few questions:</p>
  
  <p>1) how can i get subscription state (active, suspend, canceled, etc) by subscr_id? (i tried GetRecurringPaymentsProfileDetails but it can be used when subscription was created by express checkout only). i getting error 'Subscription Profiles not supported by Recurring Payment APIs'.</p>
  
  <p>2) how to manage subscription state by subscr_id? (also tried ManageRecurringPaymentsProfileStatus, but getting error 'The profile ID is invalid'  all the time)</p>