transfer of files with 0KB

[pakual]

thanks- here it comes:


* flashfxp: unregistered,
* Windows XP sp3
* Running behind hardware router/firewall [yes ] Model [sidewinder]
* Running software firewall: No
* Running Antivirus Yes, Name: trend micro
* Internet Connection DSL

system error message

[R] 421 Unable to accept data connection. Service unavailable.

again, thanks for any hint!