You indicate 'server' so you aren't using a standalone install of PRO or *Map I presume.
If you don't have multiple installations of python or the python that is being used isn't the one that you think is being used, it will remain an issue.
You might want to file a tech support ticket... since no other suggestions have helped.
Server stuff can be messy, and I assume you can print from a local installation of python leaving you with little options