You should add a namespace to the package, like namespace="/"
. But if you want to stick with namespace=""
(that could create problems and/or unattended results), you can try to specify it in the form:
<s:form action="placerequest.action" namespace="" ... >
Also, for test purposes only, include in your project the Struts2 Config Browser plugin, to see how actions are mapped (browse them with the left menu).
Remember to remove it before releasing to production ;)