Live Trace Illustrator

Hi,




I am trying to live trace this image. It has a paper texture grey background which I dont want to trace. It is a jpeg. All I want to trace is the unicorn horn. Ignore white is greyed out and if I click object, trace, make it totally disappears. Does anyone know where I am goind wrong here?


Please help.

I didn't find the right solution from the Internet.

References:
www.bcvmmorums.co.uk/threads/
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Thanks