marketpress and cubepoints

I just bought marketpress, and I have installed it along with cubepoints.
When I save a new product, the values for "product details" go away when I save the item. The sku, the price the inventory, everything in that table disappears when I save it. The description and the image stays, but the product details disappear.

Can you help with that?

Wordpress version: 3.4.2
Marketpress version: 2.7
Cubepoints version: 3.1.1

site: xcannabis.com