Problem installing COMSOL in Linux(Ubuntu14.04) OS

I got trial version of COMSOL for 3 weeks. I have Linux(Ubuntu 14.04) OS. While installing, it is asking license.dat file, I am providing the path of the file, but every time when I am providing the path, it is generating a new license file, so the license file is not matching. It is giving error. Can you anyone help how to solve that?


Thank you