export responses from offline survey app and import them in limesurvey , how ?

hi everyone

I added my lime survey in the offlinesurveyapp. i have more then 20 responses in local (not sync)! Then export the
responses from offlinesurvey app ,(it generate 2 files "DBResults" , EASYResults) the exported files are in csv format. I am using the limesurvey CE 3.25.3 version. I try to import the csv file in the limesurvey but its not working .

Please help to do this.