wordsworth

I have a series of WMA files a client supplied. These files play fine and completely on Windows Media Player. However, if I attempt to load them with Express Scribe or convert them with Switch I only get a partial file as a result. For instance, a 20 minute audio file will show up as only 10 minutes when it is converted, and cut off at the ten minute mark. The files are Windows Media Audio v8. What would make them have this difficulty being converted? How can I convert them completely?