MSP430F5244: DMA working problem

My code for the DMA spi is given below, but the problem is I'm not able to transfer not even single byte using the function. Help me anybody if I'm doing something wrong in the funcion.

void SPI_DMATx(uint8_t* SrcAddr,uint16_t Len)
{
	  DMACTL0 = DMA0TSEL_23;        // DMA interrupt trigger is spi_b1
	  __data16_write_addr((unsigned short) &DMA0SA,(unsigned long) &SrcAddr[1]);
	                                            // Source block address
	  __data16_write_addr((unsigned short) &DMA0DA,(unsigned long) &UCB1TXBUF);
	                                            // Destination single address
	  DMA0SZ = Len-1;                               // Block size
	  DMA0CTL = DMASRCINCR_3|DMASBDB|DMADT_0;  // inc src
	  DMA0CTL |=DMAEN;
	  UCB1TXBUF=SrcAddr[0];
	  while (DMA1CTL & DMAEN);
}