Why won't my audiobooks play?

I have downloaded several audiobooks from Overdrive onto my computer. I synched these files in Windows Media Player with my Sansa m250.

The files appear in the file tree, but they won’t play past the first two parts. I get a message telling me to “synchronize to continue your music subscription.”

First of all, there’s nothing to synchronize to, and secondly - I don’t want to have to do that every time I finish listening to a chapter!

Does anyone have an idea of how I can fix this?

Read this thread onsite by h3rr3tt

http://forums.sandisk.com/sansa/board/message?board.id=e200&message.id=8298&query.id=95799#M8298

My e280 v2 has the same issue…

The m200 Series is not on the overdrive list of compatible devices.  The Sansa Clip, cXXX, eXXX, Express and SanDisk SDMX1-256 are listed, but not the m200’s.

http://www.overdrive.com/resources/drc/#compatible

Waiting to see if the Fuze is???

My 240s play overdrive books without problem.