My LG Optimus Me can't root (and can't go to recovery mode!)

Hi,

i'm really sad for my mobile phone (LG Optimus Me p350). I did something wrong (thanks to ROM Manager Pro) and can't load. If i turn up the phone, just there is logo LG and all 4 software buttons are flashing!.. :'( I can't go to the recovery mode, too. I can't do anything. PLEASE HELP!!!:///