I create an AdPlugg Network space in my right sidebar zone set to the same size as my existing ads. It's been a week and I haven't seen a single ad. Is because of the size restriction?
It looks like the problem is your ads.txt file. If your site has an ads.txt file, the file will need to include entries for AdPlugg in order for your AdPlugg Network ads to get listed on the exchange. I've just emailed you the lines to add to your file. Once the new lines are added, it can take a day or two for the change to get picked up and for the ads to start filling.