Upload size is always zero.

When I try to upload files to the server SmartFTP always locks. The name of the file I am trying to upload displays on the server with the correct file size. However, the hourglass remains on for an extended period (5+ minutes). When SmartFTP finally unlocks, the file name which I am trying to upload is shown on the server but the file size is ALWAYS zero.
Would appreciate some help with this one!

Thanks,

John R.

Get the latest developer build from

https://www.smartftp.com/download

-Mat