Plugin is not sending emails to the customer – only admin emails!

Please help! This is a great email template for woocommerce but I cannot get it to send emails to the customer email address. No email is sent when I checkout the order on the website.
– The customer receives the emails when the plugin is deactivated with the same email addresses and order details.
– I have checked the php settings and the xml module has been activated.
– I have used different customer email addresses yahoo!, outlook, gmail, hotmail and all work when the plugin is deactivated but not when the plugin is activated.
– I have gone into woocommerce – order/edit order and the order email is sent to the customer email address when I select orders/resend order notification.
– I receive all the admin email notifications when the plugin is on and off – the customer emails just aren’t being sent!