hello

ive been trying to do the unlock on my 1.1.2 OTB.
I follow the instructions and install the unlock on 1.1.1 and then try to upgrade to 1.1.2.
when i try to jailbreak 1.1.2 i get this message
"cannot connect to ur device,please plug ur iphone into ur computer.If ur still having trouble,restart the computer,reconnect the device and try again."
I have done this a million times.I have also downloaded the "opt" folder and put it in my root,still doesnt work...
any help appreciated
thanks