Multistore HTTPS

[paleoglobe]

Hi guys,

i have a multistore installation with two shops in it.
I am using two different domains that both get results in google.

Now i have a problem with https. Since this is one installation, i have https installed on my main domain, but i cannot seem to get this working on my second domain.

When i type in the adress https://www.shop2.be, in firefox for example, it sends me to www.shop2.. The browser states that the page is not safe.
When i do the same for https://www.shop1.be, the result is actually https://www.shop1.be, and here the browser says it is safe.

How can i get my shop2 safe as well? How should i handle this?

Thanks
Christophe