Invitation email password

The invitation for an existing account to be accepted into my Zoho account asks for a password for the current account but doesn't accept the current password. Same with reset. Is it a Zoho account it is looking for? I have not yet been able to set up a Zoho account because it gives me the error " The email address is already registered with another account which is not a part of this organization." I get that, but now that I have sent the invitation, how do I get it transferred?