Error on the Mac Pro?

Hello!
I downloaded the demo version of Mokey for Mac OS 10, but it’s not working. I use Mac Pro Intel dual 2HGz . Displays error message: Failed to verify license. FLEXlm Error Code: -1 Can’t find the license file "license.dat.
Please contact technical support: support@imagineersystems.com, including the FLEXlm error code.

What could be the problem? Help!

Sorry for my bad English.
Sincerely Max Kislinsky.