Images not showing when customer use HTTPS

I use Zencart 1.3.8
I tried to logging my site as a customer to see what they see. I found that using a secure serveur to logging or HTTPS, no omages will show on the site except images for adds-on module such as google checkout.
I cannot tell when it started but in the past two months I did not do any updates or upgrades.
I remember that 3 months back i did a domaine name change. It seems like if the css file is not loading in HTTPS
Please help me

Try to see what is hapening.

http://cheapvoip-calls.com/my_shop/

https://cheapvoip-calls.com/my_shop/

You may need to contact your host, and ensure that the secure side of your domain is pointing to the right location, and allows folder contents to be shown. Your header image https://cheapvoip-calls.com/my_shop/includes/templates/classic/images/logo.gif is currently unavailable, however, this is certainly the correct location for the image, and so I believe your config and store are setup correctly.

Unfortunately, I believe this to be a domain setup issue which you may need to ask your host to resolve.

Absolute

Thanks for your prompt response. I will contact the host and send you a feedback as soon as I get it.
Thanks

Absolute:

You may need to contact your host, and ensure that the secure side of your domain is pointing to the right location, and allows folder contents to be shown. Your header image https://cheapvoip-calls.com/my_shop/includes/templates/classic/images/logo.gif is currently unavailable, however, this is certainly the correct location for the image, and so I believe your config and store are setup correctly.

Unfortunately, I believe this to be a domain setup issue which you may need to ask your host to resolve.

Absolute