Add to Cart image fails to appear on search page

[Richard]

We're now using 6.3.1. and have database uploaded a whole new range of
products (first time we've uploaded new products in a while).
Now when we use search (for some of those newly uploaded products) , the
search result page order image we use is missing on some of those new
products products, but not all. Cannot see why it is on some and not others.
This only appears to be a problem with the new products we have uploaded and
not previously uploaded ones.
Please advise
You can see this easilty by going to:
http://www.shoplite.com/index.htm
Type "M18" (without ") in the search box and scroll down - you will see a
whole bunch of icons missing in the middle .
Thanks
Richard Ruda