Products Not showing on product pages and Back Office

[brik]

Hello,

 

In the front office there are no products showing after selecting a category. The catagory images show with the number of products in that category. But nothing else.

 

In the back office the product images show, but if you try to edit the product it will go no further than information. The same occurs while trying to add a new product.

 

This has been up for about 6 months and has just started but it could have started with an update.

 

The version I am using is PS V 1.6.1.1. Unfortunately, we cannot just reinstall the program as there has been a lot of customisation done to the site.

 

If anyone has any idea your reply would be much appreciated.

 

Brian Kiggin