theme conflict with woocommerce

Hi,

I try to make a Shop Page with the Musica-Theme.
I use WooCommerce, and mostly it´s fine.

But there is one problem:
-If I have a variable product:
-When I click the product image in the woocommerce shop-page (catalogue),
it links me to the single-product-page, thats fine
-But: on the single-product-page, after selecting the variation, there is no
add-to-cart-button


When I do it like this:
-shop/Catalog :
-Click the "select options"-button to go to the single-product-page
... and so on ... than the add-to-cart button is there

it seems to be a conflict between woocommerce and musica.

Is there a solution?