Aduc7020 - can't enable IRQ0-IRQ1

Hi,

I'am working on project where I have EVAL Aduc7020MKZ and MMA8452Q Accelerometer. Accelerometr can send interrupts when data ready. I'am using pins 20(IRQ0) and 21(IRQ1) for handling external interrupts. The problem is that I can't set IRQEN variable to XIRQ1_BIT.

void init_i2c_uart(){

        GP1CON = 0x2211;         // Set UART tx & rx pins on P1.0 and P1.1  = 0x0011
                                 // and I2C on P1.2(SCL) and P1.3(SDA)     = 0x2200

        // Start setting up I2C at 100kHz
        I2C1CFG = 0x82;          // Master Enable & Enable Generation of Master Clock
        I2C1DIV = 0xCFCF;        // 0xCFCF = 100kHz, 0x3232 = 400kHz

        // Start setting up UART at 9600 bauds
        COMCON0 = 0x080;        // Setting DLAB
        COMDIV0 = 0x88;         // Setting DIV0 and DIV1 to DL calculated 19200
        COMDIV1 = 0x000;
        COMCON0 = 0x007;        // Clearing DLAB

        // Interrupt config
        IRQ = My_IRQ_Function;  // Interrupt rutine

        // Interrupt enabled
        // SM_MASTER1_BIT = I2C1, XIRQ0_BIT = IRQ0, XIRQ1_BIT = IRQ1
        IRQEN = XIRQ1_BIT;

        GP4DAT = 0x04000000;     // P4.2 configured as an output. LED is turned on
}

int main (){

     POWKEY1 = 0x01;
     POWCON = 0x00;
     POWKEY2 = 0xF4;

     init_i2c_uart();
     i2c_byte_read(ACC_ADDR, WHO_AM_I);

    while (1)
    {;}
}

The LED on GP4DAT won't lit after IRQEN = XIRQ1_BIT. I tried another varible like SM_MASTER1_BIT and everything worked fine and LED was turned on.