Enhance Interrupt initiation

Hello Friend's,

I am trying to use following code for using enhance interrupt initiation but a am not able to initialize Enhance Interrupt, every time i run the application it return -1, mean interrupt not enable.

i have add Vector Interrupt Controller with NIOS-II using sopc builder and do the necessary connection and generate the sopc builder.

please comment on code , where i am wrong

*attached is the output of code

# include <stdio.h># include "sys/alt_irq.h"# include "system.h"# include "altera_avalon_pio_regs.h"
volatile int edge_capture;
  void handle_load_data_interrupts(void* context, alt_u32 id)
  {
      volatile int* edge_capture_ptr = (volatile int*) context;
      IOWR_ALTERA_AVALON_PIO_IRQ_MASK(LOAD_DATA_BASE, 0x1 );
      *edge_capture_ptr = IORD_ALTERA_AVALON_PIO_EDGE_CAP(LOAD_DATA_BASE);
      IOWR_ALTERA_AVALON_PIO_EDGE_CAP(LOAD_DATA_BASE, 0x1);
      IORD_ALTERA_AVALON_PIO_EDGE_CAP(LOAD_DATA_BASE);
  }
  void init_load_pio()
  {
  void* edge_capture_ptr = (void*) &edge_capture;
  IOWR_ALTERA_AVALON_PIO_IRQ_MASK(LOAD_DATA_BASE, 0x1);
  IOWR_ALTERA_AVALON_PIO_EDGE_CAP(LOAD_DATA_BASE, 0x1);
  alt_ic_isr_register(LOAD_DATA_IRQ_INTERRUPT_CONTROLLER_ID, LOAD_DATA_IRQ, handle_load_data_interrupts, edge_capture_ptr, 0x0);
  }
int main()
{
         int     rc;
     printf("\n\tInitillize the Enhanced Interrupt..");
     init_load_pio();     
     rc = alt_ic_irq_enable(VIC_INTERRUPT_CONTROLLER_ID,VIC_IRQ);
     if(rc<0) printf("\n\tEnhance Interrupt not enabled, Return value = %d",rc);
     else printf("\n\tEnhnace interrupt enabled, Return value = %d",rc);
  return 0;
}

my Victor Interrupt Controller Configuration is as follow

* VIC configuration

*

*/

# define ALT_MODULE_CLASS_VIC altera_vic# define VIC_BASE 0x11041000# define VIC_DAISY_CHAIN_ENABLE 0# define VIC_INTERRUPT_CONTROLLER_ID 0# define VIC_IRQ -1# define VIC_IRQ_INTERRUPT_CONTROLLER_ID -1# define VIC_NAME "/dev/VIC"# define VIC_NUMBER_OF_INT_PORTS 8# define VIC_RIL_WIDTH 4# define VIC_SPAN 1024# define VIC_TYPE "altera_vic"