Taiwangun Post code help

[Thesman106]

So I really liked the look of some pouches and parts on this website and was more then willing to take the punt. However I am having a lot of frustration with the post code. It asks for "AA9 9AA" format. The thing is my postcode is "A9 9AA". For example E3 5SP. Has anyone else encountered this problem before and could they possibly help me? I've already sent an email to them but I doubt it will return with any promising results. 

 

[Sneaky]

Clear everything and press tab to fill in each field. This worked for me.