Registration is off center

Hi, my voucher works perfectly but the registration (name and email) is centered left by default and I don’t see where to go to center it with the rest of the page. Great plug-in BTW
Problem can be seen at: http://fashionexchangesd.com/?voucher=7c9b8948af7a75bd4a0d5da4b11682d3

http://wordpress.org/extend/plugins/voucherpress/