How to set SMCLK in MSP430f5529 & use Timer

Hello ,

    I am using  MSP430F5529 in that i had set clk at 16mhz . but my question whenever in change TA0CCR0 value but its time remains unchanged . so can anybody can help me.  how to change vary time

here is my code

	 //================================Clock initialization==================================//

	 UCSCTL3 |= SELREF_2;                      // Set DCO FLL reference = REFO
	 UCSCTL4 |= SELA_2 + SELS_4;                        // Set ACLK = REFO

 	__bis_SR_register(SCG0);                  // Disable the FLL control loop
 	UCSCTL0 = 0x0000;                         // Set lowest possible DCOx, MODx
 	UCSCTL1 = DCORSEL_5;                      // Select DCO range 24MHz operation
	UCSCTL2 = FLLD_1 + 488;                   // Set DCO Multiplier for 16MHz
	                                               // (N + 1) * FLLRef = Fdco
	                                               // (488 + 1) * 32768 = 16MHz
	                                               // Set FLL Div = fDCOCLK/2
	 	__bic_SR_register(SCG0);                  // Enable the FLL control loop

	 	/* Worst-case settling time for the DCO when the DCO range bits have been
	 	   changed is n x 32 x 32 x f_MCLK / f_FLL_reference. See UCS chapter in 5xx
	 	   UG for optimization.
	 	   32 x 32 x 12 MHz / 32,768 Hz = 375000 = MCLK cycles for DCO to settle
	 	 *
	 	 */
	 	__delay_cycles(375000);

	 	// Loop until XT1,XT2 & DCO fault flag is cleared
	 	do
	 	{
	 		UCSCTL7 &= ~(XT2OFFG + XT1LFOFFG + DCOFFG);
	                                             // Clear XT2,XT1,DCO fault flags
	 		SFRIFG1 &= ~OFIFG;                      // Clear fault flags
	 	}while (SFRIFG1&OFIFG);                   // Test oscillator fault flag

	        TA0CCTL0 = CCIE;	// CCR0 interrupt enabled
	        TA0CCR0 = 100;		// Display timer - for 32mS - 32K@8MHz, 4K@1MHz - currently SMCLK used
	         TA0CTL = TASSEL_2 + MC_2 + TACLR;// + ID__8 ; // SMCLK, contmode, clear TAR

Please help me out

Thank you