Struts2 if condition using string list

I have Array list called matrixList, on which i am iterating. I want to display different value if return value from getStatus() method equals to value "GREEN" .For some reason i am getting error "target is null for method equals"

<s:iterator status = "stat" value="matrixList">
<tr>

<s:if test="%{#status.equals('GREEN')}">
THIS IS green
</s:if>

<td class="R0C1"><s:property value="status"/></td>

<td class="R0C1"><s:property value="releaseTarget"/></td>
</tr>
</s:iterator>

Any idea, what i am missing?

Thanks