First, you have to login to your system. Look for and click the import contacts link.
Then you will be redirected to a page where you have to upload the CSV file containing a list of the contacts to upload.
And once you've uploaded the file. Scroll all the way down, and from there you will see a dropdown for the contact groups. So each contact groups have different sets of autoresponder messages.
1- Login to your client admin then go to Advanced features
2- Click on the Misc tab, in the import contacts field change to yes (allow Members to import contacts themselves).