SSIConfigSetExpClk won't execute

Hi

I'm trying to configure the SSI module on my LM3S811 eval board but the SSIConfigSetExpClk does not execute; I have attached my code. I put code to print to the LCD to see how far the code gets in execution and it does not get past SSIConfigSetExpClk. I cannot figure out why or how. I'm trying to interface with an Inertial Measurement Unit with a 16 bit data, and a 100kHz bit rate from the Inertial Measurement Unit as a slave.

Any help is greatly appreciated,

Thank You

int
main(void)
{

unsigned long ssi_base = SYSCTL_PERIPH_SSI;
unsigned long ulBitRate = 100000;
unsigned long gyroRateX;//Pass to SSIDataGet as reference
unsigned long LED;
LED = 0x05;

//
// Set the clocking to run directly from the crystal.
//
SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
SYSCTL_XTAL_6MHZ);

//
// Initialize the OLED display.
//
Display96x16x1Init(false);

SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI0);

SSIConfigSetExpClk(ssi_base, SysCtlClockGet(), SSI_FRF_MOTO_MODE_0, SSI_MODE_MASTER, ulBitRate, 8); // 100khz

Display96x16x1StringDraw("Test1", 0, 0);

/*SSIConfigSetExpClk(ssi_base,
ulBitRate*2,
SSI_FRF_MOTO_MODE_0, SSI_MODE_MASTER,
ulBitRate,
16);
*/

SSIEnable(ssi_base);

//SSIDataGet(ssi_base, &gyroRateX);

//
// Finished.
//

Display96x16x1StringDraw("Test2", 0, 0);

SSIDataPut(ssi_base, LED);

Display96x16x1StringDraw("Test3", 0, 0);

SSIDataGet(ssi_base, &gyroRateX);

Display96x16x1StringDraw("Test4", 0, 0);

}