CCHttpClient server internal error 500

CCHttpRequest* request = new CCHttpRequest();
request~~>setUrl;//response code: 200 ok
request~~>setUrl(“http://114.34.11.114/query.php”);//response code: 200 ok
request~~>setUrl;//response code: 404
request~~>setUrl(“http://114.34.11.114/project/public/member/login/”);//response code: 500
request~~>setRequestType;
request~~>setResponseCallback(this, callfuncND_selector(MusicGameMenuLayer::onHttpRequestCompleted));

const char* postData = “u_id=3&password=333333333”;
request~~>setRequestData);
request~~>setTag(“POST test1”);
CCHttpClient::getInstance()->send(request);

I don’t know how to fix server internal error 500.
Can’t CCHttpClient visit the directory of the URL?

P.S: I also use AFHTTPClient, and got the same status error.

server side has verify code, if don’t do that, it’s ok. So it is not client side problem.