What is your domain, and where is it registered? Don't include any passwords in here.
In filezilla it should be ftp.jimmywinokur.com
You can test your credentials within any browser by going here: ftp.jimmywinokur.com/
If your credentials don't work, we'll need to login to Yahoo. Some sites have separate ftp credentials from their actual website login credentials.
Do you need anymore help with this? If not please rate.
You never replied back to me, so I had no way of providing more input.