Make sure that you do not have any tabs or line breaks in your text. I see this all the time when clients send me there excel files for importing. A lot of times they are cutting and pasting text out of another document and pasting in the line breaks and tabs right along with the text. A good tool that lets you see these line breaks and tabs is BBEdit. Also there might be a limit to the number of characters allowed. Other then that, I am not sure I can help you.