Unable to open products in product list

[Metroviv]

I have Joomla 1.5.26 and VirtueMart 1.1.9. My Joomla was just updated and since then, when I log in and go to VirtueMart and then to the Product List in order to change a product and click on a product, nothing happens , ie it doesn't open. I have the same issue when logging in on my iPad. I've logged in on another computer and have had no problem. Can somebody advise what the problem might be and what to do about it?