I found the response at Paypal very slow!!!! They came back and said that I had some extra pice of code on my website that was causing an issue. My web guys said there was no problem. PayPal set up a dummy product which worked for them and when I tried to use it, it added this product to others that I had previously tried to process and I got the same fault. Howver when I removed these previous items from my list of products it worked for their test and seems to be working ever since! It took me a few days to figure this out for myself without much help from either PayPal or my web guys. I had to phone my customers and tell them to remove the items from their cart and it seemed to work for them also! Not sure where the faults lay though.....
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