Не могу прошить 2960 TC-L

уже очистил всю флешку. (она пустая)
всё равно не получаеться лил уже 3 разных последних иоса.

Cisco network asistan выдаёт
Failed to execute the command archive download-sw /overwrite /http iosFile

посдкажите в чём проблема.

sh ver
Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE, RELE
ASE SOFTWARE (fc1)
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Sat 28-Feb-09 03:51 by weiliu
Image text-base: 0x00003000, data-base: 0x01400000

ROM: Bootstrap program is C2960 boot loader
BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(44)SE5, RELEASE SOFTWARE
(fc1)

OKISI2960 uptime is 3 days, 3 hours, 44 minutes
System returned to ROM by power-on
System image file is "flash:/c2960-lanbasek9-mz.122-50.SE/c2960-lanbasek9-mz.122
-50.SE.bin"