someone plez help me?? desperate

[ATTACH]139974[/ATTACH] how??? to use it in blender 2.57

in 7 minute from this video the guy take sample colour from a picture …when i try do in blender 2.5 it dont work .in spite of that when i pick colour from an image it came out black colour .it been a crazy week for me to solve this .huhuhuhuhuhu someone help me

sorry for my bad language

plez give full step

When I click the link i get this
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