HELP!! Fatal licence error when opening Wildfire 2.0

[ptc-154468]

I have a single seat of Wildfire 2.0 installed on directly on my computer (not from server). All has been working fine for months, however this morning, when I go to open ProE, I get the following warning: License request failed for feature ProE_FoundationAdv: 51: Fatal License error: No valid license servers available. There has been no change in the IP address...any ideas on what might have gone wrong? The computer is hooked up to a network (workplace).
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[BenMuston]

Have a look at your Flexlm/FlexNet Server and see if the license is up and running. If not, try stop/start/reread license file. If it still doesn't work perhaps there has been some changes to your network card configuration. Try matching the MAC address of the license file to the MAC address of the machine - if they are different try enabling/disabling network cards (i.e. wireless or firewire(1394 connection).