I have imported products and they show in the category but not when you click on the product

[peterbraid]

The strange thing is if I go the backend and click on product as if to edit it but do not edit , just save the product functions perfectly.

my site is www.musicdirectlimited.co.uk

But the products I am experienceing difficulties are here 

http://musicdirectlimited.co.uk/shop/popular-professional-equipment/stagg/0-010-el-ac-plain-steel-st...

accessed from here

http://musicdirectlimited.co.uk/shop/pop-pro/stagg.html

can anyone help?

[peterbraid · Accepted solution]

Sorted ! Exported one that worked and one that didn't . Compared the difference .