Hi,
Working in IT I would hope I would be able to help you lol!
Try using another browser first off... I.E Google chrome its far superior for must plugins.
If that doesn't work try clearing your cache and cookies sometimes that might work.
Make sure you don't have POP ups disabled for betaboyz ( on google chrome that's the site settings page at the top left of the browser )
Maybe use a laptop or desktop rather than an Ipad?
Alternatively, if that doesn't work I suggest contacting him direct and placing the order straight through PayPal rather then accessing the site.
you can contact him via email or the betaboyz FB page I believe!
hope this helps
George