Olá pessoal, como faço para voltar a IOS do cisco 2600
esta informando estas menssagens
System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
TAC:Home:SW:IOS:Specials for info
C2600 platform with 32768 Kbytes of main memory
loadprog: bad file magic number: 0x0
boot: cannot load "flash:"
obrigado a quem me ajudar.