downgrade help please

bridtown

hey there i got a Iphone 3GS on 02 it was on 3.1.3 i jailbreaked with spirit happy days

problem

i had to update to the new 4.0 that put my phone on new firmware 05.13.04 right before i did the update i downloaded a program called umbrella and saved my shsh i saved file to desktop

iphone-3.1.3.shsh

i forgot about this and every 1 said could not do anything with it but i was messing with tinyumbrella and saved my shsh for os 4.0 i saw this

ECID so just messing around i changed the device version to what i used to have and put in my numbers from my .shsh and it took some time and this message came up when i pressed display shsh

how do i get back on 3.1.3???

thank you

o this is what tinyumbrella says

Device: iPhone3GS 4.0 (8A293)
Model: MC131B/A
Name: iPhone
BbSNUM:/384ohdZZQSIdQ== Baseband: 05.13.04 - 6.4_M3S2
ECID reset [3223743790381]
Processing SHSH Request...
SHSH Response Captured for [iPhone3GS 3.1.3 (7E18)
Caching shsh files...
>> Found [2] shsh files to cache...
>> Cached [2] shsh files
>> TSS Server Started!
>> TSS Accepting connections...
>> TSS Server has cached the following files:
>> iPhone3GS 3.1.3 (7E18)-4118236673293
>> iPhone3GS 4.0 (8A293)-3223743790381
>> Devices with ECIDs matching the above AND restoring to the exact firmware version listed above will succeed!
>> TSS Server has cached the following files:
>> iPhone3GS 3.1.3 (7E18)-4118236673293
>> iPhone3GS 4.0 (8A293)-3223743790381
>> Devices with ECIDs matching the above AND restoring to the exact firmware version listed above will succeed!
>> TSS Server has cached the following files:
>> iPhone3GS 3.1.3 (7E18)-4118236673293
>> iPhone3GS 4.0 (8A293)-3223743790381
>> Devices with ECIDs matching the above AND restoring to the exact firmware version listed above will succeed!

i uninstalled itunes 9.2 and put on 9.1.1

i got this error


so i put the phone into thingi mode where she screen went blank and tryed to restore and also tryed to another mode where you get itunes and usb and got same error this



please can any 1 help i hate os4

thank you