You might want to check your license file to see what the file is "keyed" to. I don't have the FlexLM manuals in front of me (to check the -97,121 codes), but from what I have seen elsewhere, the license file might be keyed to the old systems disk drive. In the Windows environment it is possible to do that instead of the more common (under UNIX anyway) Mac Address. If that is the case, you will need to obtain a new license file from PTC.
Try running the commands on the new machine to obtain the LMHOST information and compare that to the information in the current license file. Hopefully that will reveal something useful.
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