If you already have Fring, use the below settings to connect via beetamax:
Fring SIP settings and voip setup configuration guide:
Choose SIP from the list (press your joystick in to select items in the list) and press Next using your right soft key.
A new screen appears choose "Other" from the list.
your beetamax username*
your beetamax account password *
* Your existing beetamax username and password
Once Fring is registered to make a SIP call:
1. Choose a contact in your address book and press "Options" using your left soft key.
2. From the Call submenu, choose "SIP call". Your call is made using the beetamax account you have added.