Product Variations Add to Cart Button not showing

Hi,

I am trying to add a new product to my mums online business webpage. The product is 12X12 Card Stock which comes in 19 Colours in a Weave style and 8 Colours in a Plain Card Stock.

I have added 2 lots of Attributes 12X12 Card Stock Weave & Then 12X12 Plain Card Stock. I added the Image of what colour it was on all of them.

I then added Variations under each one the colours they come in. I then published it and they appear with the price and the drop down box but not the add to cart button.

So I then re did it with only one attribute and re added the variation colours and still no add to cart button.

Can someone please help I have customers trying to order them in different colours. I am using Woocommerce I followed all the online instructions and its not working.