Uploading wavs

I was trying to upload some recordings of mine in the original music forum but it fails to attach the wavs everytime. I searched the forums and can't find any similar problems (ie. uploading anything but photos). I'm using firefox.

Any ideas? Thanks in advance.

is the file too big? the max file size for wav is 7.92MB

The files are only 3mb.

your internet connection might be timing out while uploading the file