Import coupons function doesn't work

I’m trying to import a batch of coupons via .csv import.

I was able to format the .csv file exatly what Awocoupon Pro requires, so there was no error message during import, but no coupons added to the coupon list.

Then I created a new cuopon, exported it by a sample export function, deleted the coupon, and imported it back using the generated sample .csv file. No error message, but no coupon on the list.

What I'm doing wrong?

Importing can both update and add.  If you want it to add, then you would need to leave the id field blank, otherwise it tries to update.  Is the id field blank?