Calendar appointments will not delete from online calendar or phone after deleting from desktop Outlook

I have Outlook 2010 on my laptop. I use Outlook Connector to sync my calendar to my Nokia 510 Windows Phone (via my Hotmail online account). When I delete calendar items from my laptop, then "send / receive" to synchronize, the items do not delete from my online calendar nor from my Windows Phone. However, I am able to add a new item and it will sync online and on my phone. I would like to have old items no longer on my laptop calendar delete from my online calendar and my phone.