MSP430 Real time clock (RTC_B) doesn't work. Cannot write date/time registers - microcontroller

Question

I'm trying to set date/time registers using the RTC_B module of MSP430F5338 microcontroller.
I'm doing it like this:
RTCCTL0 = 0;
RTCCTL1 |= RTCHOLD +RTCBCD;
RTCHOUR = 0x14;
RTCCTL1 &= ~RTCHOLD;
It doesn't work, and simply ignore the assignements. I cannot understand why. The only strange thing I've noticed is the RTCOFIFG flag set.
Any idea?
Addendum
This is how I set up clock sources:
void clk_init(){
SetVcoreUp (0x01);
SetVcoreUp (0x02);
SetVcoreUp (0x03);
UCSCTL3 = SELREF_2; // Set DCO FLL reference = REFO
UCSCTL4 |= SELA_2; // Set ACLK = REFO
__bis_SR_register(SCG0); // Disable the FLL control loop
UCSCTL0 = 0x0000; // Set lowest possible DCOx, MODx
UCSCTL1 = DCORSEL_7; // Select DCO range 50MHz operation
UCSCTL2 = FLLD_1 | ((f_SMCLK/f_ACLK) -1); // Set DCO Multiplier for 25MHz
// (N + 1) * FLLRef = Fdco
// (762 + 1) * 32768 = 25MHz
// Set FLL Div = fDCOCLK/2
__bic_SR_register(SCG0); // Enable the FLL control loop
// Loop until XT1,XT2 & DCO stabilizes - In this case only DCO has to stabilize
do{
UCSCTL7 &= ~(XT2OFFG | XT1LFOFFG | DCOFFG);
// Clear XT2,XT1,DCO fault flags
SFRIFG1 &= ~OFIFG; // Clear fault flags
}while (SFRIFG1&OFIFG); // Test oscillator fault flag
}
void SetVcoreUp (unsigned int level)
{
// Open PMM registers for write
PMMCTL0_H = PMMPW_H;
// Set SVS/SVM high side new level
SVSMHCTL = SVSHE | SVSHRVL0 * level | SVMHE | SVSMHRRL0 * level;
// Set SVM low side to new level
SVSMLCTL = SVSLE | SVMLE | SVSMLRRL0 * level;
// Wait till SVM is settled
while ((PMMIFG & SVSMLDLYIFG) == 0);
// Clear already set flags
PMMIFG &= ~(SVMLVLRIFG | SVMLIFG);
// Set VCore to new level
PMMCTL0_L = PMMCOREV0 * level;
// Wait till new level reached
if ((PMMIFG & SVMLIFG))
while ((PMMIFG & SVMLVLRIFG) == 0);
// Set SVS/SVM low side to new level
SVSMLCTL = SVSLE | SVSLRVL0 * level | SVMLE | SVSMLRRL0 * level;
// Lock PMM registers for write access
PMMCTL0_H = 0x00;
}

Answer 1

I've SOLVED adding this before clock setup:
while (BAKCTL & LOCKBAK) BAKCTL &= ~LOCKBAK;
Basically this is due to the fact that msp430f5338 has the battery backup system, so you'll need this code before you set XT1 drive ACLK.
Hope this helps.

Answer 2

Having just had a browse through the datasheet - two things:
By setting the RTCBCD flag in RTCCTL1, you're saying you want to use binary-coded decimal, so setting RTCHOUR as 0x0A is nonsense. To write proper BCD for, say, 14:47 (2:47pm), you write the hours as 0x14 and 0x47 as the minutes, i.e., write as you see.
Ensure you're not in low power mode 5 (LPM5) - configuration settings are not retained.
Addendum:
Also, the RTCOFIFG flags says you had a fault with your oscillator, so confirm your circuitry too.