How to root samsung galaxy quattro gt-i8552

3 day ago I buy one samsung galaxy duos quattro in tanjung malim , perak , malaysia. why i buy this smartphone? no because i need, no because for style, but iam only corius, how linux can make one application so populers, and then now i have this smarphone in my hand. I tries rooting but this make me tired. last night I dont sleep until 11am. I already tries more application for rooting this android system, still make me curious. I trying 5 days, I tries Framaroot (all Version), chines root system already I tries, China System Application but stiil cant.  and more applications maybe 5 away already i tries,
Now my cwm can't apply update from sd card, E:unknown Volume Path [/sdcard] . this screenshot

so cant help me,,  but I dont give up ,, I still trying ,,  if succes, i posted int this post..
I finally succeed also, looks what I found :-D

Bla bla bla