Q100051: Floating license install fails: "The license string has an incorrect system ID"
You can only install the license on the machine for which the license was encoded. Did you successfully install the license there ?
If so, then send Support a diagnostic from it.
You should not attempt to install the floating license on any client-side machines. It is only to be installed on the machine that will act as license server.
Floating licenses start line 2 with the word "ISV" or "VENDOR".