when use gae remote error occured : com.google.appengine.repackaged.com.google.api.client.http.HttpResponseException: 302

[justdoit via StackOverflow]

when i use gae remote api connect to remote server error occured like:

com.google.appengine.repackaged.com.google.api.client.http.HttpResponseException: 302 at com.google.appengine.repackaged.com.google.api.client.http.HttpRequest.execute(HttpRequest.java:1070) at com.google.appengine.tools.remoteapi.OAuthClient.get(OAuthClient.java:64) at com.google.appengine.tools.remoteapi.RemoteApiInstaller.getAppIdFromServer(RemoteApiInstaller.java:413) at com.google.appengine.tools.remoteapi.RemoteApiInstaller.loginImpl(RemoteApiInstaller.java:376) at com.google.appengine.tools.remoteapi.RemoteApiInstaller.login(RemoteApiInstaller.java:337) at com.google.appengine.tools.remoteapi.RemoteApiInstaller.install(RemoteApiInstaller.java:173) at com.test.gae.ConnectRemoteGAETest.testConnect(ConnectRemoteGAETest.java:56) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

**my code just like what docs gives:**
RemoteApiOptions options = new RemoteApiOptions()
    .server("your_app_id.appspot.com", 443)
    .useServiceAccountCredential("ser...@gserviceaccount.com",
                        "258a5.p12");

RemoteApiInstaller installer = new RemoteApiInstaller();
installer.install(options);
// ... all API calls executed remotely
installer.uninstall();

is there something wrong in my code and how to handle this?

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