I've looked all over the internet and can't find a solution for this one...

I have a site that works fine in ie, but when you try to access the secure portion from firefox, it prompts a certificate error. I've checked all I can and every link to css and all images are full path, https:// on that page. Even the google analytics is https://, but it also gives a secondary certificate error regarding this too.

I can't figure this one out and my client said that he had someone not order from him because of it.

https://www.biplaneride.com/flights.php

Any ideas? It is a comodo cert.

Thanks,