Category sorting will not keep

I have Taxonomy turned on in the plug in setting and have dragged my categories to the order I wish but it does not keep, when I go back in it is reset to the original order. I have tried clicking apply, I have tried just leaving the page, I have tried everything. How do you get it to stay.

http://ww.wp.xz.cn/plugins/order-up-custom-post-order/