...
To resolve this problem, verify that the license server is responding properly as described above in "Inability to query license server."
Failure to start FLEXlm license server on Windows Vista
When trying to install a FLEXlm v9.2 application (for example, ESRI ArcGis) on Windows Vista, FLEXlm may fail when starting the license server. This failure can occur regardless whether UAC is enabled or disabled.
FLEXlm v9.2 was available long before Windows Vista, so it was not possible to test for all conditions that might occur on Windows Vista.
To fix this problem, update to a more recent version of FLEXlm through your application vendor. As an alternative workaround, you can run the license server as a background process using a batch script, such as the following:
@echo off
cmdow @ /hid
cd "c:\program files\esri\license\arcgis9x"
lmgrd -z -c license.lic
Failure to find licenses for FlexNet license server
...