When I try to upload files via Media Manager, the message 'sending request to zencart' etc. appears, like it does when fiels DO upload. Only after waiting several minutes (time enough to have loaded the file) the screen goes back to the Media Manager overview window and the file was NOT added to the collection. Media is MP3, media type is MP3, why will it not succeed? Other (and larger) fioles have successfully uploaded many times.
What am I doing wrong?
Bookmarks