For us to help, I think you'll need to tell us a bit more about what you are using, and what you have done so far.
Which servlet container?Have you checked that it is installed and running right for other web applications? (does it have a "demo", for example?)How have you "added a context", and where have you put it?Did you know that the .../servlet/... style of mapping is not a good idea and has a lot of problems?How have you arranged your files and directories in your new "context"Do you have a WEB-INF/web.xml file, and if so, what does it contain?anything else which might be of interest? Thanks.