I recall having seen this problem before and I found it among my emails but I did not write down the solution for some reason. I know I tried everything but eventually got someone from Autodesk to help me with it. I think it was a problem with the license file.
If you want you can email me the license file and I can see if there is something obvious. Contact details on my website.
Jimmy Bergmark
JTB World - Software development and consulting
Owner/Developer
Website: http://www.jtbworld.com/
Blog: http://blog.jtbworld.com/
JTB FlexReport (FLEXnet / FLEXlm license report tool) -
http://www.jtbworld.com/jtbflexreport
Jimmy Bergmark
JTB World - Software development and consulting for CAD and license usage reports
https://jtbworld.com