Solution for Creo 3.0 License Failure during installation

Dear All,

This is Haris and recently i join PTC community.

i got problem during installation Creo 3.0. before that i was installing Creo 2.0 there was not any problem after that i removed Creo 2.0 and tried to install Creo 3.0. when i drag and drop license file it didn't accept and status answer was invalid file and formate. then again i tried several time but i failed. could anybody help to solve this issue?

awaiting

regard

Muhammad Haris@