i am a beginner in all this rooting stuff. i am rooting my samsung galaxy s3 first time. i downloaded all the tools that were required to root that includes odin3.07, cf tar file, samsung usb drivers. when i open odin it doesnt recognize my phones model no. niether the time the phone s in downloading mode nor in the on mode and when i usually connect my phone to my pc it shows my phones modelno. in my computers under portable devices. please help me out