diff --git a/README.md b/README.md
index 55e1054..8d3174e 100644
--- a/README.md
+++ b/README.md
@@ -1,46 +1,24 @@
-# grafana-zabbix
-Zabbix API datasource for Grafana dashboard
+# Grafana-Zabbix
+## Zabbix API datasource for Grafana dashboard
 
-![alt tag](https://cloud.githubusercontent.com/assets/4932851/7454206/34bf9f8c-f27a-11e4-8e96-a73829f188c4.png)
+Read more in Grafana-Zabbix [wiki](https://github.com/alexanderzobnin/grafana-zabbix/wiki).
 
+Display your Zabbix data directly in [Grafana](http://grafana.org) dashboards!
 
-Query editor allows to add metric by step-by-step selection from host group, host, application dropdown menus.
+![2015-05-31 17-51-00 grafana - zabbix datasource - google chrome](https://cloud.githubusercontent.com/assets/4932851/7902354/fdf66368-07bf-11e5-991d-1e9892b2d0b0.png)
 
-![alt tag](https://cloud.githubusercontent.com/assets/4932851/7441162/4f6af788-f0e4-11e4-887b-34d987d00c40.png)
-![alt tag](https://cloud.githubusercontent.com/assets/4932851/7441163/56f28f16-f0e4-11e4-9d46-54181c2a2e7e.png)
-![alt tag](https://cloud.githubusercontent.com/assets/4932851/7441167/5f29cc94-f0e4-11e4-8d39-7580f33201f6.png)
+Useful metric editor with host group and application filtering:
+
+![2015-05-31 17-53-23](https://cloud.githubusercontent.com/assets/4932851/7902360/156a9366-07c0-11e5-905b-4c21b52f1f44.png)
 
 
 ## Installation
 
 ### Grafana 1.9.x
+See [grafana-1.9](../../tree/grafana-1.9) branch or Grafana-Zabbix [wiki](https://github.com/alexanderzobnin/grafana-zabbix/wiki).
 
-Download latest release and unpack into `<your grafana installation>/plugins/datasource/`. Then edit Grafana config.js:
-  * Add dependencies
-  
-    ```
-    plugins: {
-      panels: [],
-      dependencies: ['datasource/zabbix/datasource', 'datasource/zabbix/queryCtrl'],
-    }
-    ```
-  * Add datasource and setup your Zabbix API url, username and password
-  
-    ```
-    datasources: {
-      ...
-      },
-      zabbix: {
-        type: 'ZabbixAPIDatasource',
-        url: 'http://www.zabbix.org/zabbix/api_jsonrpc.php',
-        username: 'guest',
-        password: ''
-      }
-    },
-    ```
-    
 ### Grafana 2.0.x
-Download source code and put `zabbix` directory into `<your grafana-2 installation>/public/app/plugins/datasource/`.
+Download source code from master branch and put `zabbix` directory into `<your grafana-2 installation>/public/app/plugins/datasource/`.
   * Edit plugin.json (located in `zabbix` directory) and set your `username` and `password`
   
     ```
@@ -70,3 +48,31 @@ Download source code and put `zabbix` directory into `<your grafana-2 installati
   * Restart grafana server.
   * Add zabbix datasource in Grafana's "Data Sources" menu (see [Data Sources docs](http://docs.grafana.org/datasources/graphite/) for more info) and setup your Zabbix API url.
   * **Important!** Change `Access` to `direct`!
+    ![2015-05-18 12-46-03 grafana - zabbix org - mozilla firefox](https://cloud.githubusercontent.com/assets/4932851/7678429/b42a9cda-fd5c-11e4-84a3-07aa765769d3.png)
+
+#### Note for Zabbix 2.2 or less
+Zabbix API (api_jsonrpc.php) before zabbix 2.4 don't allow cross-domain requests (CORS). And you can get HTTP error 412 (Precondition Failed).
+To fix it add this code to api_jsonrpc.php immediately after the copyright
+```
+header('Access-Control-Allow-Origin: *');
+header('Access-Control-Allow-Headers: Content-Type');
+header('Access-Control-Allow-Methods: POST');
+header('Access-Control-Max-Age: 1000');
+
+if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
+	return;
+}
+```
+before 
+```
+require_once dirname(__FILE__).'/include/func.inc.php';
+require_once dirname(__FILE__).'/include/classes/core/CHttpRequest.php';
+```
+[Full fix listing](https://gist.github.com/alexanderzobnin/f2348f318d7a93466a0c).
+For more info see zabbix issues [ZBXNEXT-1377](https://support.zabbix.com/browse/ZBXNEXT-1377) and [ZBX-8459](https://support.zabbix.com/browse/ZBX-8459).
+
+#### Note about browser cache
+After updating plugin, clear browser cache and reload application page. See details for [Chrome](https://support.google.com/chrome/answer/95582), [Firefox](https://support.mozilla.org/en-US/kb/how-clear-firefox-cache). You need to clear cache only, not cookies, history and other data.
+
+## Troubleshooting
+See [Grafana troubleshooting](http://docs.grafana.org/installation/troubleshooting/) for general connection issues. If you have a problem with Zabbix datasource, you should open a [support issue](https://github.com/alexanderzobnin/grafana-zabbix/issues). Before you do that please search the existing closed or open issues.
diff --git a/Roadmap.md b/Roadmap.md
new file mode 100644
index 0000000..dcae1b5
--- /dev/null
+++ b/Roadmap.md
@@ -0,0 +1,9 @@
+Development roadmap
+===
+
+Features
+---
+- [ ] Annotations
+- [ ] Zabbix trends support
+- [ ] Templated dashboards support
+- [ ] IT services support
diff --git a/zabbix/datasource.js b/zabbix/datasource.js
index b3b146d..b427d8c 100644
--- a/zabbix/datasource.js
+++ b/zabbix/datasource.js
@@ -287,7 +287,8 @@ function (angular, _, kbn) {
 
           // Handle auth errors
           if (response.data.error.data == "Session terminated, re-login, please." ||
-              response.data.error.data == 'Not authorised.') {
+              response.data.error.data == "Not authorised." || 
+              response.data.error.data == "Not authorized") {
             return self.performZabbixAPILogin().then(function (response) {
               self.auth = response;
               return self.performZabbixAPIRequest(method, params);
@@ -799,4 +800,4 @@ function formatAcknowledges(acknowledges) {
   } else {
     return '';
   }
-}
\ No newline at end of file
+}