Impossible activate draftsight 2018 sp2.0

Impossible activate draftsight 2018 sp2.0 , the error is '"Impossibile contattare il server in questo momento. L'applicazione verrà chiusa. Riavviare Draftsight e riprovare più tardi".. I called your assistence's number and they say me to make assistence's request from this community. In order to be contacted my mail is ingricchiardi@yahoo.it. Thank you,