User (customer) not registered

Hello,

I have the following problem.

Affiliate can register and generate affiliete link. If customer use this affiliate link he can buy a product and the affilite gets his provision BUT:

the customer is not registered as a new wordpress user!!! So the customer did not get username and password!

When I do not use this plugin the user (customer) is registered. When using this plugin only affiliate is registered.

I use woocommerce and install also woocommerce integration light.

Please help.

Marek