Fix my joomla 1.5 with virtuemart 1.1.9 for works with a shared ssl

Hello i have this website: [login to view URL]~tiendavi/ i have a problem for configure my store with the shared ssl [login to view URL]~tiendavi/ In the last step of the checkout the website dont go to the payment methods with that. The shared ssl is configured in virtuemart 1.1.9 for works only in the payment form. I need that you fix that and turn works my website with the shared ssl. I have the same website in this another link: [login to view URL] but in this website i have a ssl ([login to view URL]) in this another website i dont have any problem with the check out process.. The problem is only when i use the website in a shared ssl... Please Help me!