Deleting Files & Folders

Hi,

Our Company is having an ftp server. We use this to transfer files to our branch offices across the globe.

There are some folders and files in the ftp, which i am trying to delete using smartftp software; but no use. still the files are there. i am getting an error saying "500 Unknown Site Command".

When i check the folder or file property it says the owner and group as "ftp". If i try to create a new folder in the ftp, then i am able to delete. i am not able to delete only the existing files and folders.

Can anyone help me in this regard.

Regards

S. Gopalakrishnan