Unable to setup sync with CRM from Campaign

Unable to setup sync with CRM from Campaign

I have changed the e-mail for my CRM account and generated a new ZSC Key. If I go to Campaigns Contacts -> Sync Contacts and want to setup a new sync to CRM I am told that the    An account with this email address has already been created in your org. Please contact your org administrator for access priviges. 


I just want to be able to push leads and contacts from CRM to Campaigns!???