Pro maps google not working when uploaded to web site!

I just bought pro maps google for a dynamic holiday rentals site. It all works fine in DW, but the map does not show up when I upload the page to the web server. Instead, there is a blank space. I followed all the instructions - got an API v2, etc. etc. from google and on their site it says there are 'no issues' with my api. I followed the (very simple and clear) steps on the DW pro maps google extension - entering the dynamic data from a pre-existing recordset (which brings up other info on the site)... I have run out of ideas.

Any help would be greatly appreciated. Here is the site where it is supposed to be, but where there is instead a blank space (at the bottom of the page) of the size of the supposed map.

home%20details.php?propertyID=21

If I cannot get this to work, I will need to ask for a refund. I would prefer to get it to work though!