Uploading Problem

Hi,
I've written about this problem before but still have no answer. I've used this SmartFTP for a number of months without any problem. Now when I go to transfer files to an IP address the upload button is grayed and I cannot upload anything. I'm just starting a small business and I need to transfer pictures and documents. This is a major problem for me. Someone please help sooooon.
Thanks,\
J. L. Gallagher