Does WPML work with Custompress

I have Custompress installed and created several custom post types.

I have purchased WPML and the translation flags to translate the content from WPML are not appearing on the Custompress custom post types as they do for regular posts.

I know you recommend WPML and I perhaps naively assumed they would work together because of this.

Do they work together? Or have I missed doing something simple?

Kind regards,
Yusef