I think I've uploaded everything I need to - the page in question, and all the webassist folders.
For testing purposes, try this URL:
Click on View Your Itineraries.
You should see Itineraries with the IDs : 127, 125, 126, 122, 124, 129
Click on an itinerary name to go to the details page.
Try changing the ID at the end of the URL to 118.
I notice now that the Itinerary Profile section isn't displaying.
What should happen here anyway? Should the user be presented with the log in page?