Rooting xperia

Android is basically a linux file system.  Normally xperia comes without root permission to access it's system folders. In order to get access to root folder we must perform 'root' on our device..i got a tool name 'SuperOneClick' from xda.i used It to root my phone..
http://forum.xda-developers.com/attachment.php?attachmentid=485088&d=1294607042
You must connect phone in usb debugging mode..