targeting lower abs?

[mater11]

my problem is my lower abs. my upper abs are good, but i can't seem to develop my lower abs. i'm 6'3, 190 lbs. 9-10%bf, and still no lower abs!
need an excercise to really blast my lower abs.
any help will be much appreciated.

[yellows2k]

lower BF, no way to spot reduce.