function error in MIPS

[-EquinoX-]

my code is

however whenever I tried to print something inside the function it always gives me a bad address error, can someone please tell me why?? this is my code:

largest : #Function prologue
      subu $sp, $sp, 56
      sw $a1, 44($sp)
      sw $a0, 40($sp)
      sw $ra, 36($sp)
      sw $fp, 32($sp)
      sw $s7, 28($sp)
      sw $s6, 24($sp)
      sw $s5, 20($sp)
      sw $s4, 16($sp)
      sw $s3, 12($sp)
      sw $s2, 8($sp)
      sw $s1, 4($sp)
      sw $s0, 0($sp)
      addiu $fp, $sp, 56

      lw $s0, 0($a0)                # $t0 = first elements in the numbers array
      li $s2, 1                 # $t2 = 1
      li $s3, 0                 # $t3 = 0

iterate : #Loop Test  
      add $s1, $s2, $s2                 # quadruple i to get offset for numbers[i]
      add $s1, $s1, $s1
          add $s5, $s1, $a0                 # compute address of numbers[i]
      lw  $s7, 0($s5)               # t7 = value stored at numbers[i]

      addi $s2, $s2, 1              # $t2 ++ 
      beq  $s3, $a1, result             # if $t3 equals to numElements then count result
      addi $s3, $s3, 1              # $t3 ++   

      #Loop Body
      slt $s4, $s0, $s7             # $t4 = 1 if $t0 is less than $t7
      beq $s4, $zero, iterate           # if $t5 not equal to zero then iterate again
      lw $s0, 0($s5)                # else $t0 = $t7
      j iterate                 # iterate

result:   add $v0, $s0, $zero               # put the result of the largest number into $v0

      #Function epilogue
      lw $a1, 44($sp)
      lw $a0, 40($sp)
      lw $ra, 36($sp)
      lw $fp, 32($sp)
      lw $s7, 28($sp)
      lw $s6, 24($sp)
      lw $s5, 20($sp)
      lw $s4, 16($sp)
      lw $s3, 12($sp)
      lw $s2, 8($sp)
      lw $s1, 4($sp)
      lw $s0, 0($sp)
      addiu $sp, $sp, 56
      jr $ra


average : #Function prologue
       subu $sp, $sp, 56
       sw $a1, 44($sp)
       sw $a0, 40($sp)
       sw $ra, 36($sp)
       sw $fp, 32($sp)
       sw $s7, 28($sp)
       sw $s6, 24($sp)
       sw $s5, 20($sp)
       sw $s4, 16($sp)
       sw $s3, 12($sp)
       sw $s2, 8($sp)
       sw $s1, 4($sp)
       sw $s0, 0($sp)
       addiu $fp, $sp, 56


           li $s2, 0                    # $s2 = 0

iterate1 : #Loop Test
      add $s1, $s2, $s2             # quadruple i to get offset for numbers[i]      
      add $s1, $s1, $s1
      add $s5, $s1, $a0
      lw $s0, 0($s5)

      add $s4, $s4, $s0             # s4 = total addition of the array to numbers[i]

      #LoopBody
      addi $s2, $s2, 1                  # $s2 ++ 
      beq  $s3, $a1, result1            # if $t3 equals to numElements then count result 
      addi $s3, $s3, 1              # $t3 ++  
      j iterate1                    # iterate1

result1 : div $s4, $a1
      addi $a2, $a1, 0 
      mfhi $a1

      addi $a0, $a1, 


      mflo $a0

      jal printAverage        

      #Function epilogue
      lw $a1, 44($sp)
      lw $a0, 40($sp)
      lw $ra, 36($sp)
      lw $fp, 32($sp)
      lw $s7, 28($sp)
      lw $s6, 24($sp)
      lw $s5, 20($sp)
      lw $s4, 16($sp)
      lw $s3, 12($sp)
      lw $s2, 8($sp)
      lw $s1, 4($sp)
      lw $s0, 0($sp)
      addiu $sp, $sp, 56
      jr $ra

thanks

[-EquinoX-]

I think i made a mistake on the procedure convention here, cause everytime I call the largest function and then call the average function. The register $s0-$s7 isn't set back to zero. What's wrong here??