[1.1.2 OTB] Problem downgrading

Well I followed the same steps I followed on the other 3 1.1.2 iphones i jailbroken, but this one got me an error after installing oktoprep when i tried to upgrade back to 1.1.2
So i tried to restore back to 1.1.1 to repeat the process so I wouldn't get an error on upgrading, but i got that error on downgrading. Unknown error (9)
Tried to kick out off restore mode with ibrickr but i got the green screen.
Tried to restore 1.1.2 and back to 1.1.1 but the same error.

Any ideas on what to do next?
I was told i could use the 1.1.2 jailbreak to kick 1.1.2 out of restore mode but i m afraid this could brick the phone and its not mine to toy with!