Try to generate MP3 on the fly from audio editing webpage.
By creating the MP3 first and flush the content to the handset, I can mark the completion of the download process.
Microsoft's Media player plays it without problem. But the Nokia 6630 can not start up the player and complains "Can not play multi-media ...". Direct download from the MP3's uRL is ok. I am pretty sure that the MIME is set properly from the aspx page and are flush out properly.
Any idea? Shall I add "content-disposition" or Etag to the header?