I try to upload my music to magix.info. I export the arrainements to mp3, but when I try to upload I am told that only mp3's can be uploaded. if my araingements converted to mp3's why are you telling bme that they are not mp3's? this is very frustrating, so, please give bme an answer to this problem. it has ocorred 9 times already. I am using an hp pavilion computer operating windows7. the software is music maker mx.