Wrong address range for custom IP in SOPC

hey Daixiwen sorry to trouble you again i seem to be having problems with reading / writing... more than one value i have no clue why i have tried everything possible the code works well as long as its only one value being written or read as soon as i change that to more than one i start getting garbage values. i implemented the address logic like u said.. i have pasted the test code here again please let me know if what i am doing is right or wrong ...

////////////////////////////////// here is the C code in Nios 2 ///////////////

int main(void)

{

printf("enter the values to be passed\n");

for(i=0;i<1;i++)

{

scanf("%d",&k);

iowr(scalar_write_inst_base,i,k);

yy= iord_32direct(scalar_write_inst_base,i) ;

printf("\n output data is %#x \n",yy);

}

//////////////////////////// verilog test code///////////////////////////////

input [1:0] addr_off; ---- for address decoding logic

reg [31:0] qx,qy;

reg[31:0] temp;

input[31:0] write_data;

output[31:0] read_data;

always @ (posedge CLOCK_50)

begin

if(addr_off==0)

begin

qx = write_data;

read_data = qx;

end

else if (addr_off==1)

begin

qy= write_data;

read_data=qy;

end

end // always

/////////////////////////////// end //////////////////////////////////////////

the same code works if i just have one value to read or write but fails if more than 1 which makes me think there is some problem in the address decoding or in the S/w access side..

Please do let me know what am i doing wrong..

Or is there something else i should be taking into account and i havent ??

Thanks again..