Hi again, nice to hear you can move one,
your problem was Boolean (checkbox). A simple checkbox which allows choosing an alternative answer – Yes or No.

with Multiple selector. This Selector allows user to choose a few from the available answers. It can have two types: Selector Box or a set of Checkboxes.

Block and Fields creation, you can read more about it here:
http://www.boonex.com/trac/dolphin/wiki/ProfileFieldsBuilder

Cheers
Ottar