Ive tried to upgrade to 1.1.2 several times now, and it never works (jailbroken).

I install OKtoPrep on 1.1.1 and Shift click update and go to 1.1.2.

But whilst on 1.1.2, the windows.bat file in the 1.1.2 jailbreak folder, doesnt work. You click it, and it just flashes for a second?

Answers ASAP please.