Sorry I didn't realize you've already replied me.
Yes I have my site defined on DW CS4 (I've used eCart at least 3 years) and a PHP file is always open when trying to add the add to cart button.
Could you let me know what my set-up should be before sharing a screen so I don't have to make you wait once it starts?
At the moment my eCart is 610. I'v downloaded 611, not installed yet.
I noted my Skype info in Private Message.
Thank you for your help!