check your web.xml for Admin servlet mappings and also web-inf/classes check for your admin servlet class. if you dont need admin servlet you can just remove the mappings. in my case the axis plugin was not providing the Admin Servlets. so I used to directly hit the service by typing the entire URL.
try something like http://localhost:8080/<ur
web app name>/services/<your service class name>?wsdl --> this will give you the WSDL of your service or
web app name>/services/listServices --> this URL will provide you the list of available services. there if your service is not listed then try debugging your code and jars that you are using.
hope this helps.