Embed Wall > General > Gallery2 Thumbnails

Hi,
I'm having some problems with thumbnails being displayed very tiny on one of the embedded wall on my website.

I need to be able to resize them, so that they are legible (honest, they are THAT small!).

I'm using Gallery2 (latest version) with the RSS plugin (again latest version) both integrated into Joomla 1.5.

The code snippet is below.

{source}
[[script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js"]] [[/script]]
[[div id="wall"]][[!-- 3D Wall Goes Here --]][[/div]]
[[script]] var flashvars = { feed: "http%3A%2F%2Fwww.slater-jones-sidings.co.uk%2Fgallery2%2Fmain.php%3Fg2_view%3Dslideshow.SlideshowMediaRss%26g2_itemId%3D124", numRows: 1, backgroundImage: "http://www.slater-jones-sidings.co.uk/images/exhibition-exterior.png" };
var params = { allowscriptaccess: "always" };
swfobject.embedSWF("http://apps.cooliris.com/embed/cooliris.swf", "wall", "900", "450", "9.0.0", "", flashvars, params);
[[/script]]
{/source}

If you go to http://www.slater-jones-sidings.co.uk you'll see what I mean. I really need the thumbnails to be at least twice the size.

The odd thing is I have embedded walls on other pages, and they are absolutely fine.

Would the solution to this be to use the alternative method ? (ie not to use flashvars). I notice from another post that this could be a workaround by disabling the thumbnails, but I'm not sure how to implement the code so it would work with Gallery2.

Any help gratefully received.

Thanks
Mike