diff --git a/res/values-en/strings.xml b/res/values-en/strings.xml
index 450bc71..004e077 100644
--- a/res/values-en/strings.xml
+++ b/res/values-en/strings.xml
@@ -157,5 +157,6 @@ Contributors and issue\'s reporters</string>
     <string name="err_sync_http_request_parse_resp">Error #15: Unable to parse server response</string>
     <string name="err_sync_no_connection_available">Error #16: No data connection available</string>
     <string name="err_sync_account_unparsable">Error #17: malformed account. Please reconfigure it</string>
+    <string name="err_sync_ocsms_not_installed_or_oc_upgrade_required">Error #18: OcSMS app is not installed or ownCloud awaiting for an upgrade</string>
     
 </resources>
diff --git a/res/values-fr/strings.xml b/res/values-fr/strings.xml
index d779817..461d2e9 100644
--- a/res/values-fr/strings.xml
+++ b/res/values-fr/strings.xml
@@ -117,4 +117,5 @@ Les contributeurs et rapporteurs de bugs</string>
     
     <string name="err_sync_no_connection_available">Erreur #16: Aucune connexion data disponible</string>
     <string name="err_sync_account_unparsable">Error #17: Compte mal configuré. Merci de bien vouloir le reconfigurer.</string>
+    <string name="err_sync_ocsms_not_installed_or_oc_upgrade_required">Error #18: L\'application OcSMS n\'est pas installée ou ownCloud attend d\'être mis à niveau.</string>
 </resources>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 41f2fb3..8e0a45d 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -167,6 +167,8 @@ Contributors and issue\'s reporters</string>
     <string name="err_sync_http_request_parse_resp">Error #15: Unable to parse server response</string>
     <string name="err_sync_no_connection_available">Error #16: No data connection available</string>
     <string name="err_sync_account_unparsable">Error #17: malformed account. Please reconfigure it</string>
+    <string name="err_sync_ocsms_not_installed_or_oc_upgrade_required">Error #18: OcSMS app is not installed or ownCloud awaiting for an upgrade</string>
+    
     <string name="title_activity_main">MainActivity</string>
     <string name="title_section1">Section 1</string>
     <string name="title_section2">Section 2</string>
diff --git a/src/fr/unix_experience/owncloud_sms/engine/OCSMSOwnCloudClient.java b/src/fr/unix_experience/owncloud_sms/engine/OCSMSOwnCloudClient.java
index b6ac860..ead905b 100644
--- a/src/fr/unix_experience/owncloud_sms/engine/OCSMSOwnCloudClient.java
+++ b/src/fr/unix_experience/owncloud_sms/engine/OCSMSOwnCloudClient.java
@@ -354,8 +354,15 @@ public class OCSMSOwnCloudClient {
 				respJSON = new JSONObject(response);
 			} catch (final JSONException e) {
 				if (skipError == false) {
-					Log.e(TAG, "Unable to parse server response", e);
-					throw new OCSyncException(R.string.err_sync_http_request_parse_resp, OCSyncErrorType.PARSE);
+					if (response.contains("ownCloud") && response.contains("DOCTYPE")) {
+						Log.e(TAG, "OcSMS app not enabled or ownCloud upgrade is required");
+						throw new OCSyncException(R.string.err_sync_ocsms_not_installed_or_oc_upgrade_required,
+								OCSyncErrorType.SERVER_ERROR);
+					}
+					else {
+						Log.e(TAG, "Unable to parse server response", e);
+						throw new OCSyncException(R.string.err_sync_http_request_parse_resp, OCSyncErrorType.PARSE);
+					}
 				}
 				return null;
 			}
diff --git a/src/fr/unix_experience/owncloud_sms/sync_adapters/SmsSyncAdapter.java b/src/fr/unix_experience/owncloud_sms/sync_adapters/SmsSyncAdapter.java
index fb85aa7..8ce55f4 100644
--- a/src/fr/unix_experience/owncloud_sms/sync_adapters/SmsSyncAdapter.java
+++ b/src/fr/unix_experience/owncloud_sms/sync_adapters/SmsSyncAdapter.java
@@ -65,7 +65,6 @@ public class SmsSyncAdapter extends AbstractThreadedSyncAdapter {
 
 			// and push datas
 			_client.doPushRequest(null);
-
 			nMgr.dropSyncErrorMsg();
 		} catch (final OCSyncException e) {
 			nMgr.setSyncErrorMsg(getContext().getString(e.getErrorId()));