Help with STS add to cart button

[MOBASS]

Hi all,

 

I have added the STS to my shop and set up the product_info.php page but I can't get the add to cart button to work.

 

The template said to use $addtocartbutton but all this does is add a button but you can not click on it.

 

What I need is to be able to click on it and add the item to the cart.

 

Can anyone tell me how to do this?

 

Thanks

 

Simon