Need Help! V24 Circular Pocket

Hi Gentlemen,

I'm a newby with v24Pro, but I've been able to do a good deal of pocketing over the last couple of weeks. One problem that I am having is that whenever I try to do either a circular profile or a circular pocket, the code I am generating is not getting the Centurion V controller on my mill to do circular interpolation--a few x and z axis moves and that is it. I tried breaking the geometry of my full circle up in four quadrants--and still no joy.

Here's a sample of some code for a simple .434 radius circular pocket:

(Knuckle Hole)
(MACH_FILE=3AXVMILL.MCH)
(MTOOL T2 S1 D0.25 H1.375 DIAM_OFFSET 2 = 0.125)
(SBOX X0. Y-4.737 Z-1.215 L7.435 W0. H0.)
(END PREDATOR NC HEADER)
%
O100 (PROGRAM NUMBER)
(PROGRAM NAME - L-105 MAIN & SIDE RODS JIG 1)
(POST - CENTURION 5)
(DATE - THU. 12/20/2012)
(TIME - 08:58PM)
N01 G00 G17 G20 G32 G40 G50 G69 G80 G90
N02 T2 M06
N03 S3758 M03
N04 X6.7387 Y-1.673
N05 G43 H2 Z0.5
N06 G01 Z-0.0585 F30.0688
N07 G17 G03 X6.7387 Y-1.673 R0.0587
N08 G01 X6.8637
N09 G03 X6.8637 Y-1.673 R0.1837
N10 G01 X6.9887
N11 G03 X6.9887 Y-1.673 R0.3087
N12 G00 Z0.5
N13 X6.7387
N14 Z0.4415
N15 G01 Z-0.117 F30.0688
N16 G03 X6.7387 Y-1.673 R0.0587
N17 G01 X6.8637
N18 G03 X6.8637 Y-1.673 R0.1837
N19 G01 X6.9887
N20 G03 X6.9887 Y-1.673 R0.3087
N21 G00 Z0.5
N22 M05
(END OF PROGRAM)
N23 M02
%

Any idea what I am doing wrong?

Dave Queener
Knoxville, TN