Why Can't I Register On Qantas FF Program?

I'm having a frustrating time registering for on the Qantas website. My country of origin is US. Is that the problem? I fill out the entire form, but when I click submit it tells me to fill in the spaces highlighted in yellow....which there are none, every field is filled. Is there some sort of technical glitch? Really want to register to use it to check CX award availability.