Thanks to a JTB FlexReport customer I have I got this information. IBM told them there is defect in the Macrovision’s 10.8 version of their License Manager. This was related to Rational applications but might as well be the the case for other applications like AutoCAD 2007 that uses this version and I know this has been a problem for Autodesk applications as well.
A workaround for many have been to use the TIMEOUTALL feature.
If you can, try to get at least version 10.8.5 from your vendor or reseller. I know that version 11.1 and version 11.4 exists but is not available from Macrovision's public ftp from what I can find.
The lowest acceptable value for timeout of Autodesk products is 900 seconds (15 minutes) and for MathWorks is 14,400 seconds (4 hours) and for IBM 7200 seconds (2 hours).