+    /**\r
+     *  Try to access with  user/pass ""/"", to know if it is a regular server\r
+     */\r
+    private void tryEmptyAuthorization() {\r
+        mTryEmptyAuthorization = true;\r
+        \r
+        Log_OC.d(TAG, "Trying empty authorization to detect authentication method");\r
+        \r
+        /// be gentle with the user\r
+        showDialog(DIALOG_LOGIN_PROGRESS);\r
+        \r
+        /// get the path to the root folder through WebDAV from the version server\r
+        String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, mAuthTokenType);\r
+\r
+        /// get basic credentials entered by user\r
+        String username = "";\r
+        String password = "";\r
+\r
+        /// test credentials \r
+        mAuthCheckOperation = new  ExistenceCheckRemoteOperation("", this, false);\r
+        OwnCloudClient client = OwnCloudClientFactory.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this, true);\r
+        client.setBasicCredentials(username, password);\r
+        mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);\r
+    }\r
+    \r
+    \r