Nokia E71 :: DRM File Stating Unable To Acquire License?

I'm a bit perplexed by this DRM situation. I downloaded an audiobook from my local library in .wma format. It is a DRM protected file. The file plays in Ovi Player without any problems. I transferred the file to my E71 and the file doesn't play. I get an error stating: "Unable to acquire license. Unknown content provider." What is strange about the situation is that I have used the above steps to transfer and listen to dozens of audiobooks from the same source without any problems. Now, I can't get any to work. I've tried several without any luck.I recently reinstalled Ovi Player on my computer and recently had my phone serviced by Nokia, which could have changed a setting somewhere. I'm not sure if that's the problem. When I open the file properties in Ovi Player, here is what Ovi Player says about the DRM protection:

DRM Protected: Yes
Remaining Play Rights: -1
Remaining Burn Rights: -1
Remaining Transfer Rights: -1

To summarize, I used to be able to play DRM protected media from this same source with no problems. Sometimes I would get the above error and a reset of my network connection would fix the problem. Now, no luck with an easy fix. Is there a setting in Ovi Player that I'm missing? A setting on my E71 that I'm missing? Why did something that worked a month ago stop working?