[Q] Root Problem topic

Hello.
I do not know if the title is good. I will explain here what happened.
my Galaxy S was android 2.3.4 jvq. I wanted to intall a newer one, a android 4.4.x
I followed a thread about how to do that.
I tryed to root the phone uing Odin and cf-root, but it failed it. After that when i powered on the phone i get some error with phone to computer and a yellow triangle in the middle.
I founded a program on internet to "unbrick" that, but now i can only enter in download mode using the 3 buttons, and dont start in normal or recovery mode.
I tryed to flah it again uing odin with cf-root but failed every time.

the odin log says this :
<ID:0/005> Get PIT for mapping..
<ID:0/005> Firmware update start..
<ID:0/005> zImage
<ID:0/005> NAND Write Start!!
<ID:0/005>
<ID:0/005> Complete(Write) operation failed.
<ID:0/005> Added!!
<OSM> All threads completed. (succeed 0 / failed 1)


Do you know any solution to my problem?
Thx.