Problemas para descargar

Tengo la version 4.0.1105.0

Pongo 10 trabajadores y habilito 10 partes por trabajador y me marca el siguiente error...

[22:44:07] Operation Begin
[22:44:07] Resolviendo nombre de host "91.121.68.147"
[22:44:07] Conectando a 91.121.68.147 Puerto: 21
[22:44:08] Conectado a 91.121.68.147.
[22:44:09] 220 Serv-U FTP Server v6.4 for WinSock ready...
[22:44:09] USER oinkyto
[22:44:09] 331 User name okay, need password.
[22:44:09] PASS (oculto)
[22:44:09] 230 User logged in, proceed.
[22:44:09] SYST
[22:44:09] 215 UNIX Type: L8
[22:44:09] Tipo de Servidor Detectado: UNIX
[22:44:09] RTT: 174.473 ms
[22:44:09] FEAT
[22:44:09] 211-Extension supported
[22:44:10] CLNT
[22:44:10] MDTM
[22:44:10] MDTM YYYYMMDDHHMMSS[+-TZ];filename
[22:44:10] SIZE
[22:44:10] SITE PSWD;EXEC;SET;INDEX;ZONE;CHMOD;MSG
[22:44:10] REST STREAM
[22:44:10] XCRC filename;start;end
[22:44:10] MODE Z
[22:44:10] MLST Type*;Size*;Create;Modify*;Win32.ea*;
[22:44:10] 211 End
[22:44:10] CLNT SmartFTP 4.0.1105.0
[22:44:10] 200 Noted.
[22:44:10] OPTS MLST Type;Size;Create;Modify;Win32.ea;
[22:44:10] 200 MLST OPTS Type;Size;Create;Modify;Win32.ea;
[22:44:10] Software de servidor detectado: Serv-U
[22:44:10] PWD
[22:44:10] 257 "/d:" is current directory.
[22:44:10] CWD /d:/District.13.Ultimatum.2009.NTSC.DVDR-VoMiT
[22:44:10] 250 Directory changed to /d:/District.13.Ultimatum.2009.NTSC.DVDR-VoMiT
[22:44:10] PWD
[22:44:11] 257 "/d:/District.13.Ultimatum.2009.NTSC.DVDR-VoMiT" is current directory.
[22:44:11] MLST vmt-d13u-dvdr.r04
[22:44:11] 250-Listing /d:/District.13.Ultimatum.2009.NTSC.DVDR-VoMiT
[22:44:11] Type=file;Size=50000000;Create=20100429014719;Modify=20100429021516;Win32.ea=0x00000020; vmt-d13u-dvdr.r04
[22:44:11] 250 End.
[22:44:11] Multipart Transfer. Number of Workers = 10
[22:44:11] Resolviendo nombre de host "91.121.68.147"
[22:44:11] Conectando a 91.121.68.147 Puerto: 21
[22:44:11] Resolviendo nombre de host "91.121.68.147"
[22:44:11] Conectando a 91.121.68.147 Puerto: 21
[22:44:11] Resolviendo nombre de host "91.121.68.147"
[22:44:11] Conectando a 91.121.68.147 Puerto: 21
[22:44:11] El cliente ha cerrado la conexión.
[22:44:11] El cliente ha cerrado la conexión.
[22:44:11] El cliente ha cerrado la conexión.
[22:44:11] 0 bytes transferred. (0 bytes/s) (109 ms)
[22:44:11] MLST vmt-d13u-dvdr.r04
[22:44:11] 250-Listing /d:/District.13.Ultimatum.2009.NTSC.DVDR-VoMiT
[22:44:12] Type=file;Size=50000000;Create=20100429014719;Modify=20100429021516;Win32.ea=0x00000020; vmt-d13u-dvdr.r04
[22:44:12] 250 End.
[22:44:12] Transfer failed.
[22:44:12] Operation End

Try it with less parts. E.g. only 2.

And try it with another server.

Con 2 o 4 trabajadores y habilitando 8 o 10 partes por trabajador si se puede...

Pero yo quiero poner 10 trabajadores.............