try to use 'curl' to access tha api and check the settings:
curl --data '{"method":"about", "params": [], "json-rpc": 2.0, "id": 0}' http://USER:PASSWORD@localhost:19988/rpc
the "/rpc" at the url is IMPORTANT!
When I use my port and name and password to run the command it gives me this error.
curl: (6) Could not resolve host: params
curl: (3) [globbing] illegal character in range specification at pos 2
curl: (6) Could not resolve host: json-rpc
curl: (6) Could not resolve host: 2.0,
curl: (6) Could not resolve host: id
curl: (3) [globbing] unmatched close brace/bracket at pos 2
Invalid RPC Request
4 parse_error_exception: Parse Error
Unexpected char '39' in ""
{"c":39,"s":""}
th_a json.cpp:411 fc::variant_from_stream
{"str":"'{method:about,"}
th_a json.cpp:421 fc::json::from_string