servlet action is not available

a strange thing is happening when i call servlet using struts, if i call it from my local host it gets called but when i deploy it on my web server it throws an error saying "servlet action is not available"

here's my web.xml

<servlet><servlet-name>action</servlet-name><display-name>socialauthdemo</display-name><description>Application for socialauth demo</description><servlet-class>org.apache.struts.action.ActionServlet</servlet-class><init-param><param-name>config</param-name><param-value>/WEB-INF/struts-config.xml</param-value></init-param><init-param><param-name>debug</param-name><param-value>2</param-value></init-param><init-param><param-name>detail</param-name><param-value>2</param-value></init-param><load-on-startup>2</load-on-startup></servlet><servlet-mapping><servlet-name>action</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping>

my struts-config.xml is as follows -

<action-mappings><action path="/socialAuth" type="com.auth.actions.SocialAuthenticationAction" name="authForm" scope="session"><forward name="failure" path="/jsp/error.jsp" /></action><action path="/socialAuthSuccessAction" type="com.auth.actions.SocialAuthSuccessAction" name="authForm" scope="session"><forward name="success" path="/jsp/authSuccess.jsp" /><forward name="failure" path="/jsp/error.jsp" /></action></action-mappings>

i have added the strus.jar file to y web-inf/lib folder

please let me know if there is something i am missing

Thanks