Hi
You know your her eyes are blue but they don't quite look it and with the black and white surroundng them they will further leach color. There is also a really strong orange (tungsten) color cast. I'm pretty sure you are doing the right thing - the blue just isnt strong enough to show well. To show you - in the first picture Ive just done a straight (quick)erase. The strawberry looks ok - but the leaves are yellow and the eyes are brownish.
In the second, I color corrected the color photo to reduce some of the color cast before creating the black and white layer to erase from. You can see now the strawberry is redder and the leaves are green. The eyes tended to be a bit green too so I create a selction of the eyes and used color balance to increase the amount of blue in them and lightened them as well.
Click on each photo to see larger.
I hope that helps