Help with MIPS programming.

[Energize]

			.data
array:		    .word 0
			.word 0
			.word 0
			.word 0
			.word 0
			.text
			.globl __start
__start:	
			la $s0, array

			li $v0, 5
			syscall
			sw $v0, 0($s0)
			
			li $v0, 5
			syscall
			sw $v0, 1($s0)
			
			li $v0, 5
			syscall
			sw $v0, 2($s0)
			
			li $v0, 5
			syscall
			sw $v0, 3($s0)
			
			li $v0, 5
			syscall
			sw $v0, 4($s0)

I keep getting the message "unaligned address in store: 0x10010001" everytime it tries to store the 2nd integer I enter. I can use "usw" instead of "sw" but I think I'm doing something wrong somewhere.