How to call action class using <a href> tag

The following code is giving error as: There is no Action mapped for namespace / and action name >.

code: .jsp file:

<a href="<s:url action='DisconnectAction' />">Disconnect</a> 

struts.xml

<action name="DisconnectAction" class="ActionPackages.DisconnectAction">
    <result name="success">/JSP/mytemplate.jsp</result>
    <result name="input">/JSP/mytemplate.jsp</result>
    <result name="error">/JSP/mytemplate.jsp</result>
    <result name="failure">/JSP/mytemplate.jsp</result>
</action>

I want to perform action and keep the current accessing page only which is mytemplate.jsp