infocube key figures have no value

I created the infocube with two key figures: sales_qty and sales_amt. After load data into the infocube, these two key figures display all 0.

When looking infocube "Transformation" created under InfoProvider, I find that the both key figures have "X" marked in Role Group (Standard Group). I can not manually link them from source.

What is wrong with is infocube? How sales data can be loaded correctly into the infocube?

Thanks for suggestions!

Mike