CCS/MSP432P401R: SPI communication problem

Part Number: MSP432P401R

Tool/software: Code Composer Studio

Hi guys, I have been using the MSP432 for a while now, and first of all I want to thank you all for all the great support you provide here.

Now to my issue, I'm programming the ADS1191 front end. At first, just for the tests, I was using the ACLK as a clock source for the SPI protocol, and it worked just fine. Now I'm trying to use the SMLCK as the clock source, I programmed it at 12 MHz because I need that speed for other peripherials,  and I'm having trouble with the clock divider for the SPI, because I want to make it go at 1 MHz. This is the code I use for the clock.

void configCLK(void){															
	CS->KEY = CS_KEY_VAL;														
	CS->CTL0 = 0x00;														
	CS->CTL0 = CS_CTL0_DCORSEL_4;											
	CS->CTL1 = CS_CTL1_SELA_2 | CS_CTL1_SELM_3 | CS_CTL1_SELS_3 | CS_CTL1_DIVS__2;				
	CS->KEY = 0x00;											
}

And here is the one I use for the SPI protocol.
void configSPI(void){														
    EUSCI_B0->CTLW0 |= EUSCI_B_CTLW0_SWRST; 								
    EUSCI_B0->CTLW0 = EUSCI_B_CTLW0_SWRST | EUSCI_B_CTLW0_MST | 				
            		EUSCI_B_CTLW0_SYNC | EUSCI_B_CTLW0_MSB;              		
    EUSCI_B0->CTLW0 |= EUSCI_B_CTLW0_SSEL__SMCLK; 					
    //EUSCI_B0->BRW = 12;                                                         
    EUSCI_B0->CTLW0 &= ~EUSCI_B_CTLW0_SWRST;						
    EUSCI_B0->IFG &= ~(EUSCI_B_IFG_TXIFG | EUSCI_B_IFG_RXIFG);					
}

As you can see, I commented the BRW instruction, because it doesn't work. When I run my code like this, the communication has no problems, but I'm concerned because the ADS1191 datasheet says that the maximum clock speed is 2 Mhz, that's why I want it at 1 Mhz, but when I put the divider of the BRW register, the communication does't even start. I usually comment my code but I'm from México, so I erased  the comments for easier interpretation.

Thanks, guys.