diff --git a/zabbix/zabbix_api.py b/zabbix/zabbix_api.py
index 87ccae9..3344a1b 100644
--- a/zabbix/zabbix_api.py
+++ b/zabbix/zabbix_api.py
@@ -276,9 +276,23 @@ def do_request(self, json_obj):
         self.id += 1
 
         if 'error' in jobj:  # some exception
+            if not jobj['error'].has_key('code'):
+                msg = 'response does not contains error->code key"'
+                self.debug(logging.ERROR, msg)
+                raise ZabbixAPIException(msg)
+            if not jobj['error'].has_key('message'):
+                msg = 'response does not contains error->message key"'
+                self.debug(logging.ERROR, msg)
+                raise ZabbixAPIException(msg)
+            tmp_data = ""
+            if not jobj['error'].has_key('data'):
+                msg = 'response does not contains error->data key"'
+                self.debug(logging.INFO, msg)
+            else:
+                tmp_data = jobj['error']['data']	
             msg = "Error %s: %s, %s while sending %s" % (jobj['error']['code'],
-                    jobj['error']['message'], jobj['error']['data'], str(json_obj))
-            if re.search(".*already\sexists.*", jobj["error"]["data"], re.I):  # already exists
+                    jobj['error']['message'], tmp_data, str(json_obj))
+            if re.search(".*already\sexists.*", tmp_data, re.I):  # already exists
                 raise Already_Exists(msg, jobj['error']['code'])
             else:
                 raise ZabbixAPIException(msg, jobj['error']['code'])