MSP430FE427 - SD16 Module Sampling

Folks,

I have the following setup:

IDE: IAR
MCU: MSP430FE427
Sample an input signal: 1Khz with 100mVp-p.
MCU CLK: 1 Mhz (TI POR default)
SD16_Fm: 1 Mhz (default)
SD16_OSR = 256 (it should give me approx. 4k samples per second, 4 times the Niquist Rate!)

I am having trouble sampling my input signal. Any guidance would be very helpful!