I just installed the "Dynamic CSS Input Buttons" by mbfergie and my "Add to Cart" button click started showing "Page Not Found" error ?

I tried it in IE, Firfox, Chrome ... same error

I even tried adjusting the "dot-prefix" setting in Admin->Configuration->Sessions as suggested by Dr Byte here http://www.zen-cart.com/showthread.p...page-not-found

but still same error message ....

Any help is very appreciated ...

Thanks