Unable to connect to qt application running on ubuntu using remotewebdriver

[AtmBeginner]

I have a qt application running on ubuntu (ubuntu is on my windows PC) and i am looking to automate my tests using selenium webdriver. Below is my code and the errors i am getting. Unable to figure out how to talk to my app. I am able to open other browsers on my ubuntu though.

public class test {
static WebDriver driver;
static String nodeUrl;
public static void main(String[] args) throws MalformedURLException{
DesiredCapabilities cp = new DesiredCapabilities();
capabilities.setCapability("browserStartWindow", "*");
WebDriver driver = new RemoteWebDriver(new URL("my ubuntu's ip:9517"), cp);

error:

Exception in thread "main" org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.
Build info: version: '3.5.3', revision: 'a88d25fe6b', time: '2017-08-29T12:54:15.039Z'
System info: host: 'CRS9L32', ip: 'ipaddress', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_144'
Driver info: driver.version: RemoteWebDriver
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:667)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:255)
    at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:237)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:138)
    at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:175)
    at Grid.Firefoxtest.main(Firefoxtest.java:25)
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to ubuntuipaddress:9517 [/ubuntuipaddress] failed: Connection refused: connect
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:159)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:359)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:381)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:237)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:185)
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:111)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:72)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56)
    at org.openqa.selenium.remote.internal.ApacheHttpClient.fallBackExecute(ApacheHttpClient.java:139)
    at org.openqa.selenium.remote.internal.ApacheHttpClient.execute(ApacheHttpClient.java:87)
    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:337)
    at org.openqa.selenium.remote.ProtocolHandshake.createSession(ProtocolHandshake.java:136)
    at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:142)
    at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:646)
    ... 5 more
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at org.apache.http.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:75)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
    ... 20 more