Adobe Sign trial results in error

I just signed up for a free trial of Adobe Sign, but during the sign up I found that I apparently had an Adobe account already. I reset my password and signed in, but received the message below. I have no idea who my account administrator is, so is there a way around this, or do I need to create a new account with a different email to get the free trial to work fully?

"You are not authorized to send documents for signature. Please contact your account administrator."