The simple way to refer a new BA to register and place them in your organization is to have them visit:
www.e-ntrepreneur.net/XXXXXXX
where "XXXXXXX" is replaced with your BAID.  This will auto-populate the "Sponsor" field and ensure that the new BA will be in your frontline and generate commissions for you going forward.  It is important to note that only TM's or higher are able to register new BA's into their organizations.

Alternately, a prospective BA can visit www.dublinetwork.com and manually enter your BAID into the "Sponsor" field to register.  This will require the new BA to know your BAID in order to register.