you have corrupted installation of an Autodesk program or if you have tweaked the registry to change the license method
You might see the following error when starting the Autodesk program.
"The security system (Softlock license manager) is not functioning or is improperly installed"
Reason for the error could be a corrupted installation of an Autodesk program or a registry tweak to change the license method from Network to Standalone.
Most cases clean uninstall and reinstall of the Autodesk Program should fix the issue.
If it doesn't fix please delete the license file and re-activate the software.
License files are located here.
On Vista or Windows 7:
On Windows XP:
C:\Documents and Settings\All Users\Application Data\FLEXnet\adskflex_00691b00_tsf.data
C:\Documents and Settings\All Users\Application Data\FLEXnet\adskflex_00691b00_tsf.data.backup
If the issue persists it could be related to the user permission, so please try to install and run the software as a local administrator account.