it says the transfer limit has been reached
I'm sorry you had problems! Unfortunately since that file is a WMA file, it can't technically be returned early, which is why you reached the download limit. Overdrive (our eBook vendor) is working with publishers to see if they can get that restriction removed, but so far they have not been able to do so.
The only option at this point is to wait until the due dates for the items you currently have. At that point you will be able to download other titles.
Once again, sorry for the hassle. If you have a problem like this again, please contact us before trying to download again. We can then work with Overdrive to make sure you get what you need without restricting your other download capabilities.