[LPC2129] nested interrupts with RealView

Hello everyone, this is my first time I'm programming any microcontroller, my task is probably quite simple - I have to use nested interrupts. I'm using interrupt from Timer0 nad ADC. I have to run ADC interrupt during executing Timer0 ISR. I've read AN1381 document and many others but I still have problem. I've tried to use intrinsic functions __enable_irq and __disable_irq, wrapper for nested interrupt functions (exactly like in example from Keil), and i still have the same problem - ADC ISR is executed after Timer0 interrupt. I've also tried to use embedded assembler functions. Below is my actual code:

main.c:

#include <LPC21xx.H>

void initVIC(void);
void initTimer0(void);
void initADC(void);
void initUART(void);
void initGPIO(void);
int sendchar(int);
void sendUART(float);

//*****************************************************************************************************************************

__irq void irqTimer0(void)
{ int i; __enable_irq(); ADCR |= 0x01200000; for(i = 0; i < 10000; i++); __disable_irq(); T0IR = 0x00000001; VICVectAddr = 0;
}

extern void adc_irq (void);
void irqADC(void)
{ float Uout; IO1SET = 0x00010000; Uout = ((ADDR>>6)&0x3FF)*3.3/1023; ADCR &= ~0x01000000; ADCR &= ~0x00200000; sendUART(Uout); VICVectAddr = 0;

}

//*****************************************************************************************************************************

int main(void)
{

initVIC(); initTimer0(); initADC(); initUART(); initGPIO();

while(1) {

}
}

//*****************************************************************************************************************************

void initVIC (void)
{ VICVectAddr0 = (unsigned int) irqTimer0; VICVectCntl0 = 0x00000024;

VICVectAddr1 = (unsigned long)adc_irq; VICVectCntl1 = 0x00000032;

VICIntEnable |= 0x00040010;
}

void initTimer0(void)
{ T0PR = 14999; T0MCR = 0x00000003; T0MR0 = 100; T0TCR = 0x00000002; T0TCR = 0x00000001;
}

void initADC(void)
{ ADCR = 0x00000300;
}

void initUART(void)...
void initGPIO(void)...
int sendchar(int)...
void sendUART(float)... I'm sure that these functions are correct so I'v reduced them

nest_irq.s: exactly like in Keil's example

PRESERVE8

AREA NEST_IRQ, CODE, READONLY

ARM

IMPORT irqADC

EXPORT adc_irq

adc_irq

PUSH {R0-R3,R12,LR}

MRS LR, SPSR

PUSH {LR}

MSR CPSR_c, #0x1F

PUSH {LR}

BL irqADC

POP {LR}

MSR CPSR_c, #0x92

POP {LR}

MSR SPSR_cxsf, LR

; VICVectAddr = 0;

MOV R0,#0

STR R0,[R0,#-0xFD0]

POP {R0-R3,R12,LR}

SUBS R15,R14,#0x0004

END

I'll be very grateful if someone could post a code wher nested interrupts are working properly and also for every comment that may help to solve my problem.