hmmmm How many files are you sharing ... I do not want you to say what they are unless they are free of any copyright restrictions, but roughly what sort of thing are they, are they correctly tagged, are people likely to search for them. How long do you leave Limewire running for. I've never counted my upload rate myself ... I'm not quite sure if you are referring to Uploads or attempted ouploads.
Let us have a few more details!