which OS are you trying to run these container images?
I ran into similar issue on RHEL Linux 7x when i tried to download images from docker store.
I was able to fix issue with using Docker community edition instead of enterprise edition. In Enterprise edition, you need to update repo settings for docker engine to force and look for image in docker store. I was not able to figure out at that time and due to time crunch i just went ahead with community edition and completed my POC.
Another thing, did you Purchase docker container from docker store? It is free, but you need to purchase in order to download.
Let me know if that is not the scenario for you.
#webMethods-General#webMethods#Integration-Server-and-ESB