it says "it can be not supported format ot it may not suppport the codec was used to compress the file". (I do have othe wma files that play on the player).
Also I dunloaded the files that were in pairs wma- wma.part
you think it has something to do with the problem
If it's a WMA.part, it means it's only part of the file. Once the file finishes downloading, it will then be known and as (name here).wma. If your file is a .part, it won't play in Media player.