сс1110 flash write

Hello!

 I use flash_dma.c from cc1110_cc2510_Basic Software_Examples.

I have a problem with the recording and subsequent reading.
I use 27MHz quartz. Here is my piece of code to initialize:

extern void quartz_up_set_HS_XOSC (void)
{
  // Power up unused oscillator (HS XOSC).
    SLEEP &= ~0x04;

    // Wait until the HS XOSC is stable.
    while( !(SLEEP & 0x40) );

    // Change the system clock source to HS XOSC and set the clock speed to 27 MHz.
     CLKCON = (CLKCON & ~(CLKCON_CLKSPD | CLKCON_OSC)) | CLKSPD_DIV_1;

    // Wait until system clock source has changed to HS XOSC (CLKCON.OSC = 0).
    while (CLKCON & 0x40);

    // Power down the HS RCOSC, since it is not beeing used.
    // Note that the HS RCOSC should not be powered down before the applied
    // system clock source is stable (SLEEP.XOSC_STB = 1).
    SLEEP |= 0x04;

     
    CLKCON = (CLKCON & ~CLKCON_TICKSPD) | TICKSPD_DIV_1;

    // Clear and set prescaler divider value to 1
    T1CTL = (T1CTL & ~T1CTL_DIV) | T1CTL_DIV_1;
 
}

I understand I need to correctly set the FWT?
My FWT = 0x24;

Or need something else?

In the Smart RF Flash programmer as the impact on the work:
  Write protect boot block,
  Block debug commands (incl. Read access)?

Please help. Thank you in advance.