Unable to download E_LIC_ALREADY_RETURNED error, help?

When I loaded an e-book I borrowed from the public library here, I got the acsm file and loaded it into Digital Editions. I realized I downloaded the wrong format for my reader, and when I returned it, and re-downloaded it in the correct format, I got the error:

Unable to Download

Error getting License. License Server Communication Problem:

E_LIC_ALREADY_RETURNED

How do I let the program know I redownloaded it in a new format?