connection error

how to solve this issue

04-28 16:33:36.663: E/Tabris(1383): Could not contact http://192.168.1.20:9090/camera
04-28 16:33:36.663: E/Tabris(1383): com.eclipsesource.tabris.android.core.transport.TransportException: Could not contact http://192.168.1.20:9090/camera
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.tabris.android.transport.http.HttpTransport.executeHttpRequest(HttpTransport.java:215)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.tabris.android.transport.http.HttpTransport.get(HttpTransport.java:115)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.tabris.android.transport.http.HttpTransport.get(HttpTransport.java:1)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.tabris.android.core.InitialGetRequestRunnable.run(InitialGetRequestRunnable.java:44)
04-28 16:33:36.663: E/Tabris(1383): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
04-28 16:33:36.663: E/Tabris(1383): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
04-28 16:33:36.663: E/Tabris(1383): at java.lang.Thread.run(Thread.java:856)
04-28 16:33:36.663: E/Tabris(1383): Caused by: com.eclipsesource.org.apache.http.conn.HttpHostConnectException: Connection to http://192.168.1.20:9090 refused
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:158)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:150)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:121)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:575)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:425)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:820)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:754)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:732)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.tabris.android.transport.http.HttpTransport.executeHttpRequest(HttpTransport.java:201)
04-28 16:33:36.663: E/Tabris(1383): ... 6 more
04-28 16:33:36.663: E/Tabris(1383): Caused by: java.net.ConnectException: failed to connect to /192.168.1.20 (port 9090) after 20000ms: isConnected failed: ECONNREFUSED (Connection refused)
04-28 16:33:36.663: E/Tabris(1383): at libcore.io.IoBridge.isConnected(IoBridge.java:214)
04-28 16:33:36.663: E/Tabris(1383): at libcore.io.IoBridge.connectErrno(IoBridge.java:152)
04-28 16:33:36.663: E/Tabris(1383): at libcore.io.IoBridge.connect(IoBridge.java:112)
04-28 16:33:36.663: E/Tabris(1383): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
04-28 16:33:36.663: E/Tabris(1383): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
04-28 16:33:36.663: E/Tabris(1383): at java.net.Socket.connect(Socket.java:842)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:123)
04-28 16:33:36.663: E/Tabris(1383): at com.eclipsesource.org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:148)
04-28 16:33:36.663: E/Tabris(1383): ... 14 more
04-28 16:33:36.663: E/Tabris(1383): Caused by: libcore.io.ErrnoException: isConnected failed: ECONNREFUSED (Connection refused)
04-28 16:33:36.663: E/Tabris(1383): at libcore.io.IoBridge.isConnected(IoBridge.java:201)
04-28 16:33:36.663: E/Tabris(1383): ... 21 more