Ubuntu 2015.04 64 bit DraftSight activation problem

Hii,

I installed draftsight 2015 SP2 to my computer. My comper 64 bit Ubuntu 2015.04.

I started draftsight and filled activation form, then I had an email about activaton, but when I clicked the activation button this error message is coming:

Error

There was an error process your registration.

Visit the DraftSight Community and review the iQuestions for possible solutions, or to report a problem

Could you help me about this problem please.

Best regards

Erdoğan YILMAZ