The long delay appears to be FAB waiting for Flexnet to finish searching for the license, etc.
Perhaps using a different PORT# for FAB to access the license (on the server) may help. Make sure on client computers to use the environment variable NUMINNO_LICENSE_FILE (as the default variable LM_LICENSE_FILE may have many other products included).
After doing a quick search I found these links which may help,
Thanks again, and please let us know your results.