Xperia play r800i rooted and bootunlocked. decided to install doomkernel (newest, version 14) with flashtool. all went well. it said it was OK. my phone doesn't turn on... at all...no signs of "life". pc won't detect it. interesting enough, I get a "device diconnected" in flashtool if the phone was plugged in and I start the program. HELP PLS