Can't get audio loopback working.

I'm trying to get the audio loop-back project from http://processors.wiki.ti.com/index.php/C6713DSK_in_CCSv5 (listed as minimal project on the wiki) working. I've follow all the steps and the program builds and debugs without errors and the project seems to run properly but  the DSP doesn't perform the audio loop-back. I've tried all the different combinations of plugging in the input and output lines on the DSP just to see if the ports I was using were wrong but I still get nothing and I've tested the lines I am plugging in and both are working. Thank you for your time and any help is appreciated.

Here's the source code for the project.

/*
* main.c
*/

#include "DSK6713.h"
#include "dsk6713_aic23.h"
#include "stdlib.h"
#include "math.h"

// Codec configuration settings
DSK6713_AIC23_Config config = { \
0x0017, /* 0 DSK6713_AIC23_LEFTINVOL Left line input channel volume */ \
0x0017, /* 1 DSK6713_AIC23_RIGHTINVOL Right line input channel volume */\
0x01f9, /* 2 DSK6713_AIC23_LEFTHPVOL Left channel headphone volume */ \
0x01f9, /* 3 DSK6713_AIC23_RIGHTHPVOL Right channel headphone volume */ \
0x0011, /* 4 DSK6713_AIC23_ANAPATH Analog audio path control */ \
0x0000, /* 5 DSK6713_AIC23_DIGPATH Digital audio path control */ \
0x0000, /* 6 DSK6713_AIC23_POWERDOWN Power down control */ \
0x0043, /* 7 DSK6713_AIC23_DIGIF Digital audio interface format */ \
0x0001, /* 8 DSK6713_AIC23_SAMPLERATE Sample rate control */ \
0x0001 /* 9 DSK6713_AIC23_DIGACT Digital interface activation */ \
};

void main()
{
DSK6713_AIC23_CodecHandle hCodec;
Int16 OUT_L, OUT_R;
Uint32 IN_L;

// Initialize BSL
DSK6713_init();

//Start codec
hCodec = DSK6713_AIC23_openCodec(0, &config);

// Set frequency to 48KHz
DSK6713_AIC23_setFreq(hCodec, DSK6713_AIC23_FREQ_48KHZ);

for(;;)
{
// Read sample from the left channel
while (!DSK6713_AIC23_read(hCodec, &IN_L));

// Feeding the input directly to output you can add effects here
OUT_L = IN_L;
OUT_R = IN_L;

// Send sample, first left next right channel
while (!DSK6713_AIC23_write(hCodec, OUT_L));
while (!DSK6713_AIC23_write(hCodec, OUT_R));
}

//DSK6713_AIC23_closeCodec(hCodec); // Codec close is unreachable
}