[Q] Rooting my Live with Walkman

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http://forum.xda-developers.com – Sorry for being a newbie here.. my WT19i build number is 4.1.B.0.587 i want to root it..and i dont know what 1st to do?i already read some tutorials here..and quite not successful..i already unlocked the bootloader, ive seen it on my system config..and now when i used ROM manager it tells me that i didnt rooted my phone and dont have SU please help me..sorry for my english! (HowTos)