Face Detection on DM368 w/o interrupt

I am having hard-time getting the Face Detection working on the DM368-ZCEF.
I am using kernel 2.6.32.17 (PSP 03.01.01.39) , along with the dvsdk 4_02_00_06

I am trying to get the Face Detection working w/o interrupt, using the bit FINISH in the FD_CTRL register.

Here is how I set the registers:

FD_DCON : 0x00000000  (up direction, min 20x20 px)
FD_STARTX : 0
FD_STARTY : 0
FD_SIZEX : 360
FD_SIZEY : 192
FD_LHIT : 4
FD_PICADDR : 0xC28C0000
FD_WKADDR : 0xC28D2C00

Then to execute the face detection:
FD_INTEN : 0x00000000
FD_CTRL : 0x00000001
wait for a few micro-seconds
FD_CTRL : 0x00000002 (RUN bit)

From there, I never see the bit FINISH set when I read the FD_CTRL register...

Any thoughts?
Thanks,
Olivier