Is this the first time you are trying to install the Freedome product on your mobile?
What is the subscription status on your phone after you have validated the promotional trial code?
Where did you get the promotional trial code from?
Based on your error message, it would be possible that the product was already installed on the device with the trial period. That would be only possibility based on the message since it says the trial period has expired.
I have sent the application log to f-secure as requested. Still waiting for a solution.