Problem testing SRAM device

Hi

I made a Project in Quartus II, and in SOPC Builder, I added NIOS II cpu, AvalonTri-State Bridge to an external SRAM, Jtag UART and a on-chip RAM. The system generation and hardware configuration went fine. I made a simple memory test application, for the external SRAM. It writes a patern on on a specific adress then reads back from that adress, checks if the value is the same that was writen, then it increases the adress and so on. But it doesnt´seem to work http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif What am I doing wrong?? The memory is a 128KByte and is 65536 words by 16bits. The hardware part is ok. I know this becouse I downloaded some applications to the external memory. While Im doing this memory test Im using the onchip ram for prorgram drives and stack.

#include <io.h># include <stdio.h># include "system.h"
int main(void)
{
  unsigned int value = 0;
  unsigned int pattern = 0x0000000F;
  unsigned int i, memory_size;
  
  // Adress size is 65536 = 0x8AD0
  // EXT_SRAM_BASE is 0x00020000
  
  memory_size = 0x8AD0;
  
  
  for(i = 0; i< memory_size; i= i+4)
  {  
    IOWR_32DIRECT((ONCHIP_RAM_BASE), i, pattern);
    
    value = IORD_32DIRECT((ONCHIP_RAM_BASE), i);
    
    printf("%d,%d\n", i,value);
    if (value != pattern)
    {
      printf("ERROR!!\n");
    }
  }
  return 0; 
}

I get the folowing output :

0,-1

ERROR!!

91964,-1

ERROR!!

91968,-1

ERROR!!

91972,-1

ERROR!!

90,15

4,15

8,15

12,15

16,15

20,15

24,15

28,15

32,15

36,15

40,15

44,15

48,15

52,15

56,15

60,15

64,15

68,15

72,15

76,15

80,15

84,15

88,15

92,15

96,15

100,15

104,15

108,15

112,15

116,15

120,15

124,15

128,15

132,15

136,268929082

ERROR!!

140,-528482025

ERROR!!

144,411041845

ERROR!!

148,-528481769

ERROR!!

.

.

.

Can someone please tell me what Im doing wrong.