It's not automatic. Jimster will have to manually activate you.
You'll receive an email from jimster480 to your paypal email.
The email will contain all information that you need. You might need to reply to that mail before he can active you. I had to.
Jimster480 have been very active recently, so it shouldn't take to long if he's not out with friends tonight, because it's saturday.
Edit: You should check your email now, I got an email from jimster 50minutes ago.