Iron SHA Error

DDR Version 1.04 20130517
In
DDR3
300MHz
Bus Width=32 Col=10 Bank=8 Row=16 CS=1 Die Bus-Width=8 Size=2048MB
Memory OK
OUT
BUILD=====2
SdmmcInit=0 0
FwPartOffset=2000 , 0
run on sd0
OK! 17736
unsigned!
SecureBootEn = 0 0
Boot ver: 0000-00-00#0.00
start_linux=====30382
SHA ERROR!
Load failed!
E:Invaid tag(0x4D524150)!
Load failed!
UsbBoot 3506113
UsbHook ...4160467
powerOn 4160495
 4343800 UsbConnected
 4455918 UsbConnected
 4534087 UsbConnected