In Despate need of css help

[High2k]

I built a joomla site and added an image gallery plugin which all works perfectly in firefox. In IE the thumbnail images do not wrap, but continue in a long row going off the page. I have tried so many ways to prevent this happening, but have come t the conclusion that my css knowledge doesn't extend this far. I'm positive it's a css issue, but I can't see what element I need to change to prevent this display problem in IE.
Any help is much appreciated as the site owner is really cross that this isn't working.
The site in question is http://www.ptlimo.co.uk/index.php/customer-gallery (http://http://www.ptlimo.co.uk/index.php/customer-gallery)

[joma]

error 403 - You are not authorised to view this resource from your link, also it is linking to
http://http//www.ptlimo.co.uk/index.php/customer-gallery

suggest you fix this if you need help