Java EE (Java Enterprise Edition) General Discussion

Hi All.
I got this "The requested resource (/PrMS/ReportOperation) is not available."

my web.xml is below:

<servlet>
<servlet-name>ReportOperation</servlet-name>
<display-name>ReportOperation</display-name>
<servlet-class>PrMS.ReportOperation</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>ReportOperation</servlet-name>
<url-pattern>/ReportOperation</url-pattern>
</servlet-mapping>

I have run so many time but still got this error
"The requested resource (/PrMS/ReportOperation) is not available."

my app web is : http://localhost:8080/PrMS/frptQuotation.jsp
my servlet : ReportOperation
servlet in my pc : C:\jakarta-tomcat-5.0.19\webapps\ROOT\WEB-INF\classes\PrMS\ReportOperation

could any body help me...