I also am with scottrade. I sent a email and this is the reply.
We are happy to help with this. When a stock stops trading on an American exchange and will only be traded on the Toronto Stock Exchange you will be able to trade this. However, you will have to call us for us to place the trade for you and it will be at the broker assisted rate of $32.
Thank you for choosing Scottrade. Please let us know if we may be of further assistance.