CRM - can't sign up!

I have signed up for Creator and have been exploring it and just now tried to sign up for CRM but it says my username is already in use - which is true, it ME! :)

Does this mean one has to have a totally separate username/pass word for each of the Zoho parts one wants to use? (That doesn't make sense.)

Also, when - if? - I do get signed up for CRM, it talks about putting other users on the program that they must have a Zoho account - is this different from the account one has for each part?

Tks for the info - jb