i upgraded my firmware from 1.0.2 to v1.1.1 using the guide here
i have reached till where i have to goto jailbreakme.com n install da appsnap...

here is the problem..after clicking on appsnap it kicks me back to da main screen..n i wait n wait but nothing happns...my display goes black n i have to press da home button to get it back on...but i had disabled the auto lock feature also...still this is happning

plz help sum1