Dummy_isr error, interrupt number: 28, INTMSK = 0xefff ffff

I am working on ARM 9 s3c2440 processor in mini2440 friendly board.
for coding i am using keil MDK software.
my code is

//#include<s3c44B0X.h>
#include <S3C2440.H>
#include<stdio.h>

#define MCLK 50000000
#define BAUD_RATE 115200
#define BAUD_RATE_DIVISOR (int)((MCLK/(16*BAUD_RATE))-1)
#define TXD0READY   (1<<2)


char data,flag=0,c = 'Y';

void serialport_init(void)
{
ULCON0 = 0x0003;         // 8bits,1 stopbit, no parity
UCON0  = 0x0005;         //Rx or Tx Interrupt Polling mode
UFCON0 = 0x00;           // FIFO is not Enabled
UMCON0 = 0x00;
UBRDIV0= BAUD_RATE_DIVISOR;
}

void delay(int a)
{
        for(;a!=0;a--)
        {
        }
}


static void __irq UART0_RX_INT(void)
{

pISR_UART0= (unsigned int)UART0_RX_INT;

INTSUBMSK = 0xFFFFFFFF;  //MASK ALL THE INTERRUPTS
SUBSRCPND = 0x01;               //Enable Recevie interrupt
SRCPND = 0x10000000;  //Enable UART0 interrupt
INTPND = 0x10000000;
c = URXH0;
flag = 1;
INTMSK   &= ~(BIT_UART0);            /* Enable UART0 interrupt           */


}



void uart_interrupt_init(void)
{
int i=0;

        INTMOD     = 0x0;                                        //All=IRQ mode
    INTMSK     = BIT_ALLMSK;                      //All interrupt is masked.
    INTSUBMSK  = BIT_SUB_ALLMSK;                  //All sub-interrupt is masked. <- April 01, 2002 SOP

        pISR_UART0= (unsigned int)UART0_RX_INT;

        SUBSRCPND = 0x1;
        SRCPND = (1<<28);  //Enable UART0 interrupt
        INTPND = (1<<28);
        INTSUBMSK = 0xFFFFFFFE;  // Enabling only RX input
        INTMSK   &= ~(BIT_UART0);            /* Enable UART0 interrupt           */
        pISR_UART0 = (unsigned int) UART0_RX_INT;


}

int main(void)
{


int i = 10;
        GPBCON = 0x015400;
    GPBUP  = 0x7ff;

        serialport_init();
        uart_interrupt_init();
        while(1)
        {

                // transmitting a single character continuous for testing
                 while (!(UTRSTAT0 & TXD0READY));
                 UTXH0 = c;

        // if a char is received via interrupt then blink the leds for certain time.
                 if(flag == 1)
                 {
                        while(i )
                        GPBDAT = 0x0FFFFFFFF;
                        delay(9000000);
                        GPBDAT = 0x000000000;

                 }
                 else
                 {
                        GPBDAT = 0x0FFFFFFFFF;
                 }

        }

}

but i am getting Dummy_isr error, interrupt number: 28, INTMSK = 0xefff
ffff
i tried a lot but i am unable to solve this .
plz help to come out of this, plz plz plz
if possible provide the source code