Quantity Discount Affect Attributes?

[Ficilya]

Try Pricing your product by attributes

No base price in product setup screen - - check the priced by attributes box
Change the attributes and enter the actual price

Thanks for your response..
I have set the product price to zero, and I have set the attributes to actual price..
Example :
Attributes => Red $60 , Blue $70
It's still doesn't work..

Is this a bug or not?
I think i need to modified something in function_prices.php, but i dont have any ide, what part or line i need to code..i've been spending about 1month to trying to solve this problem..
Thanks