Please note that you may view the error message for a failed listing by going to "Channels" --> "Marketplace Listings" --> "Errors" --> navigate to the last page in order to see the most recent error message --> then click the "Error" link to the right of the failed listing for the details.
In this case, the error message that is being returned is:
"Not enough inventory available to launch listing."
In order to correct the problem, please first edit the item. Then on the "Marketplaces" tab put a check mark in the box for "Inventory". You will then have an "Inventory" tab. Go to the "Inventory" tab and increase the "Quantity in stock" field to a number greater than 0. Please let us know should you continue to have trouble with this.