Newbie: Web Import problem with non standard port

Just starting to evaluate DT Pro (my first look at any DT technology).

First thing I tried was to import pages from my private web server. However, this server doesn’t run on port 80! It appears that the first page is imported correctly, but when following links the port number is dropped from the request, and then the link isn’t followed.

Is it me, or is this a problem? Many thanks