Can't set subscription pack options

HI,

When I access subscription plans there seems to be something wrong, the page layout is all over the place, and I can't drag or add any membership levels into the plan. It's like the javascript isn't working? I@Ve tried disabling every plugin, but doens't make any difference. I@ve also swapped themes but no luck. very frustrating, I basically can't assign ANY users as when I goto change the subscription planin members the option to select a plan is empty!?!?! THis is supposed to be going live today eeek.

my login details:
http://stevenagefcbusinessacademy.co.uk/wp-admin/

username: mtadmin
password:HIJZNUoD8Nyb

thanks