Hi,
i don't think HTML form i the best way to test your service. Check browser's address bar after submitting form. It shows something like:
../REST/WebService/Delete?age=30&name=Test
instead of:
../REST/WebService/Delete/30/Test
which LoginService is expecting. Moreover HTTP method of that request is... GET. Better try using a HTTP/REST client tool, like Simple Http Client (Chrome extension) and it should work.