Ok, that is a license problem. WizLic.dat is the correct file name. It must be in the same folder as the mach3.exe file.
If it is and still wont work then all I can guess is that somehow the license file has been corrupted in copying. If you can go back to the original e-mail and try saving it again. Watch for that windows 'feature' of not showing the file extension- sometimes that causes you to add an extension and the file becomes WizLic.dat.dat
If that doesnt fix it send ane-mail to firstname.lastname@example.org and request a new license file. They will need the exact name and e-mail you used to buy the file.