No longer playing wmv files

My unit have stopped playing wmv files for some reason, thei are added in the player, but doesnt get any track numbers, only MP3 do that

have resetted external and internal, re-added all files again, but wmv stilld doesnt count longer

Express01.01.05a

what shall i do? 

(I hate this player modell ;)  everything that can be wrong have been wrong from the beggining with it, and still are= predictable shuffling, closing down unit, auto-resetts, none working Sansa updater, this error whas just the last dropp, i see no reason  to send it back for a new…no thanks :) im convinved ill just recieve a similar one)

Message Edited by Kloppstock on 07-09-2008 02:51 AM