550 Permission Denied

I recently downloaded FTP served and trying to understand how it works. I maintain part of a website and am trying to upload information from my Windows XP (home edition) machine and continually receive the 550 Permission Denied error. On my other Windows 98 machine I receive the same error with SmartFTP, but am able to upload with my old FTP server that I downloaded a few years ago.

According to the SmartFTP website it because I do not have proper permissions ... if I don't have proper premission, why can I upload with my old FTP server on my old machine??

Any help would be greatly appreciated!!!

550 is the server telling SmartFTP that you don't have the rights. On one server you do have the rights and on the other you don't.

D