This may just be bad timing, but when I view the site now it tells me “Maintenance of the site has been suspended” and I am unable to view the source.
That is definitely the correct div and I’ll give you some extra (hopefully useful) info for when the site is back up.
There are two scripts that must be inserted in the header for the plugin to work: poroslider_vars.js and poros_client.js. When you view the source, click on the first one (poroslider_vars.js) for me and paste the content here. It should contain the links to all the images you are using, etc. Also, paste the poros div you mentioned as well as two of its parent divs (if its a lot of content, just paste one).
It would be much easier if I could view the source myself but I’m still getting the Maintenance suspended message from your host. Hope to resolve this with you soon.