diff --git a/src/main/java/fr/unix_experience/owncloud_sms/activities/LoginActivity.java b/src/main/java/fr/unix_experience/owncloud_sms/activities/LoginActivity.java
index efddf0b..0fcbf16 100644
--- a/src/main/java/fr/unix_experience/owncloud_sms/activities/LoginActivity.java
+++ b/src/main/java/fr/unix_experience/owncloud_sms/activities/LoginActivity.java
@@ -31,6 +31,7 @@ import android.os.Bundle;
 import android.provider.Settings;
 import android.support.v7.app.AppCompatActivity;
 import android.text.TextUtils;
+import android.util.Log;
 import android.view.KeyEvent;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -231,6 +232,7 @@ public class LoginActivity extends AppCompatActivity {
 	public class UserLoginTask extends AsyncTask<Void, Void, Boolean> { 
 
 		UserLoginTask(String serverURI, String login, String password) {
+            Log.d(TAG, "_serverURI = " + serverURI);
 			_serverURI = Uri.parse(serverURI);
 			_login = login;
 			_password = password;
@@ -315,6 +317,10 @@ public class LoginActivity extends AppCompatActivity {
 						_serverView.setError(getString(R.string.error_connection_failed));
 						_serverView.requestFocus();
 						break;
+                    case CONN_FAILED_NOT_FOUND:
+                        _serverView.setError(getString(R.string.error_connection_failed_not_found));
+                        _serverView.requestFocus();
+                        break;
 					case INVALID_LOGIN:
 						_passwordView.setError(getString(R.string.error_invalid_login));
 						_passwordView.requestFocus();
@@ -346,5 +352,6 @@ public class LoginActivity extends AppCompatActivity {
 		private LoginReturnCode _returnCode;
 		
 		public static final String PARAM_AUTHTOKEN_TYPE = "auth.token";
+        private final String TAG = UserLoginTask.class.getCanonicalName();
     }
 }
diff --git a/src/main/java/fr/unix_experience/owncloud_sms/authenticators/OwnCloudAuthenticator.java b/src/main/java/fr/unix_experience/owncloud_sms/authenticators/OwnCloudAuthenticator.java
index abbf346..8e7deae 100644
--- a/src/main/java/fr/unix_experience/owncloud_sms/authenticators/OwnCloudAuthenticator.java
+++ b/src/main/java/fr/unix_experience/owncloud_sms/authenticators/OwnCloudAuthenticator.java
@@ -136,7 +136,7 @@ public class OwnCloudAuthenticator extends AbstractAccountAuthenticator {
 		}
 		
 		try {
-			if(isSuccess(status)) {
+			if(OwnCloudAuthenticator.isSuccess(status)) {
 				 String response = get.getResponseBodyAsString();
 				 Log.d(OwnCloudAuthenticator.TAG, "Successful response: " + response);
 
@@ -159,7 +159,11 @@ public class OwnCloudAuthenticator extends AbstractAccountAuthenticator {
 					Log.e(OwnCloudAuthenticator.TAG, "*** status code: " + status);
 				}
 
-                bRet = (status == 401) ? LoginReturnCode.INVALID_LOGIN : LoginReturnCode.UNKNOWN_ERROR;
+                switch (status) {
+                    case 401: bRet = LoginReturnCode.INVALID_LOGIN; break;
+                    case 404: bRet = LoginReturnCode.CONN_FAILED_NOT_FOUND; break;
+                    default: bRet = LoginReturnCode.UNKNOWN_ERROR; break;
+                }
 			}
 			
 		} catch (Exception e) {
@@ -172,7 +176,7 @@ public class OwnCloudAuthenticator extends AbstractAccountAuthenticator {
 		return bRet;
 	}
 	
-	private boolean isSuccess(int status) {
+	private static boolean isSuccess(int status) {
         return (status == HttpStatus.SC_OK);
     }
 	
diff --git a/src/main/java/fr/unix_experience/owncloud_sms/enums/LoginReturnCode.java b/src/main/java/fr/unix_experience/owncloud_sms/enums/LoginReturnCode.java
index 78ebcce..fd174e7 100644
--- a/src/main/java/fr/unix_experience/owncloud_sms/enums/LoginReturnCode.java
+++ b/src/main/java/fr/unix_experience/owncloud_sms/enums/LoginReturnCode.java
@@ -30,6 +30,8 @@ public enum LoginReturnCode {
 	INVALID_ADDR,
 	HTTP_CONN_FAILED,
 	CONN_FAILED,
+    CONN_FAILED_NOT_FOUND,
 	INVALID_LOGIN,
 	UNKNOWN_ERROR,
 }
+
diff --git a/src/main/res/values-en/strings.xml b/src/main/res/values-en/strings.xml
index 7c03d25..649555d 100644
--- a/src/main/res/values-en/strings.xml
+++ b/src/main/res/values-en/strings.xml
@@ -170,5 +170,6 @@
     <string name="action_appinfo_perms">App Infos and permissions</string>
     <string name="restore_all_messages">Restore all messages</string>
     <string name="account_actions">Account actions</string>
+    <string name="error_connection_failed_not_found">Connection failed, the server returns 404 NOT FOUND. Ensure you set the correct path for your ownCloud instance.</string>
 
 </resources>
diff --git a/src/main/res/values-fr/strings.xml b/src/main/res/values-fr/strings.xml
index ded36ae..f59536e 100644
--- a/src/main/res/values-fr/strings.xml
+++ b/src/main/res/values-fr/strings.xml
@@ -155,4 +155,5 @@
     <string name="action_appinfo_perms">Infos et permissions</string>
     <string name="restore_all_messages">Restaurer tous les messages</string>
     <string name="account_actions">Actions du compte</string>
+    <string name="error_connection_failed_not_found">Echec de connexion, le serveur a retourné 404 NON TROUVE. Assurez vous d\'avoir spécifié la bonne URL.</string>
 </resources>
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index bef407d..af32d5c 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -205,4 +205,5 @@
     <string name="action_appinfo_perms">App Infos and permissions</string>
     <string name="restore_all_messages">Restore all messages</string>
     <string name="account_actions">Account actions</string>
+    <string name="error_connection_failed_not_found">Connection failed, the server returns 404 NOT FOUND. Ensure you set the correct path for your ownCloud instance.</string>
 </resources>