question on wma songs

[draginit]

all songs i have with WMA format i find will not go to their right place alphabetically in the albums lists..ive tried to manually tag them with the non mp3 tagger and all the files save but when i load them to freebox it still puts all wma albums before the first mp3 albums....for example i will see greatful dead-zztop(wma), then 36 fists, 50 cent, ac/dc, avenged sevenfold(MP3),, etc in alpha order,   what can i do to mix in the WMA folders alphabetically with my MP3's......