It looks like the old API system will have to be updated to the new Web Services connection method. We have sent the project outline to a development company we use for cost and time frame. I will post any detail on progress as we get them.
I spoke to Fabien Clermont at CanadaPost. He is the one addressing this issue. It sounds like they will want everyone to go over to the web services system eventually but I am trying to work out a solution so we can get our current code working and then move on to an update for the web services for a future upgrade.
They are going to send over the new URL's and formats. I will try to apply to the existing code to get it working. I'll post any results and findings.