WC add to cart not working in IE 11.0.3 and Chrome 32.0.1700.107

Hi guys,

I dont know why but I cannot ‘add to cart’ using IE 11 or Google Chrome!

My customer has just conntacted me saying he cannot sign-up as it is showing an error stating that No Products were found matching your selection… but the process works fine in FireFox 27.0.1

If I paste the url: http://hostingmonkey.co/shop/?add-to-cart=1222 into IE/Chrome it does not work, but pasting this into FireFox adds item to the cart as expected!

The same thing happens if I just navigate to http://hostingmonkey.co/shop/

Does anyone know why this is happening? A speedy response would be appreciated, so I can retain this customer.

Thank you.

https://wordpress.org/plugins/woocommerce/