YOU need to call PTC and explain your situation.
No one on the community can do anything towards getting you a license.
This web page may help: https://support.ptc.com/apps/case_logger_viewer/cs/auth/ssl/log
You do not 'OWN' the software! Read the license agreement. You only purchased the right to use the software on a single computer.
There are procedures for uninstalling the software from one computer and moving the license to a new computer.
These may not be the same for the student edition.
BTW, if you are a student, you can get the latest Creo edition for almost nothing. Why are you using software that is 8 years old!
The software you bought has been retired and it is no longer supported by PTC.
You have the option if you are still a student (the student edition of software is limited to the status of being a student), you can purchase the new Creo 5.0 from our store.ptc.com.