Hi Am using unix Ksh
Am getting the problem while transferring zero size files through the script .
When i transfer zero size files from local machine to remote machine manually i can able to do it .
My question its beause of zero size files am not able to transfer through script ? or its possible to transfer zero size files through script ?

Can you please post ur script here??

It should be fine, but will depend on the ftp client you are using, some could potentially skip zero length.

Some questions for you to consider:
When you are manually doing the transfer, are you doing the *exact same thing* as your script would do? If you are using a different command or different parameters, then focus your attention there.
Does the script do any checks that your manual process does not? If you are doing a checksum, you might have some bug in the script that fails to handle zero-length properly, or your script may be explicitly deleting zero length files considering them to be failed transfers.

But as PiK45 says, you'll need to list the command/script you are using to get any specific help here I suspect.