diff --git a/lib/Drivers/DML/mongodb.js b/lib/Drivers/DML/mongodb.js
index 9579362d..fbf99b39 100644
--- a/lib/Drivers/DML/mongodb.js
+++ b/lib/Drivers/DML/mongodb.js
@@ -186,7 +186,7 @@ Driver.prototype.count = function (table, conditions, opts, cb) {
 };
 
 Driver.prototype.insert = function (table, data, keyProperties, cb) {
-	convertToDB(data, this.config.timezone);
+	convertToDBTypes(data, this.config.timezone);
 
 	return this.db.collection(table).insert(
 		data,
@@ -198,12 +198,12 @@ Driver.prototype.insert = function (table, data, keyProperties, cb) {
 
 			var i, ids = {}, prop;
 
-			if (keyProperties && docs.length) {
+			if (keyProperties && docs.ops.length) {
 				for (i = 0; i < keyProperties.length; i++) {
 					prop = keyProperties[i];
 
-					if (prop.mapsTo in docs[0]) {
-						ids[prop.name] = docs[0][prop.mapsTo];
+					if (prop.mapsTo in docs.ops[0]) {
+						ids[prop.name] = docs.ops[0][prop.mapsTo];
 					}
 				}
 				convertFromDB(ids, this.config.timezone);
@@ -338,7 +338,7 @@ Driver.prototype.hasMany = function (Model, association) {
 };
 
 Driver.prototype.update = function (table, changes, conditions, cb) {
-	convertToDB(changes, this.config.timezone);
+	convertToDBTypes(changes, this.config.timezone);
 	convertToDB(conditions, this.config.timezone);
 
 	return this.db.collection(table).update(
@@ -387,6 +387,12 @@ function convertToDB(obj, timeZone) {
 	}
 }
 
+function convertToDBTypes(obj, timeZone) {
+	for (var k in obj) {
+		obj[k] = convertToDBType(k, obj[k], timeZone);
+	}
+}
+
 function convertFromDB(obj, timezone) {
 	for (var k in obj) {
 		if (obj[k] instanceof mongodb.ObjectID) {
@@ -440,6 +446,19 @@ function convertToDBVal(key, value, timezone) {
 	return value;
 }
 
+function convertToDBType(key, value, timezone) {
+
+	if (Buffer.isBuffer(value)) {
+		return new mongodb.Binary(value);
+	}
+	
+	if (key == "_id" && typeof value == "string") {
+		value = new mongodb.ObjectID(value);
+	}
+
+	return value;
+}
+
 Object.defineProperty(Driver.prototype, "isSql", {
     value: false
 });
diff --git a/lib/Instance.js b/lib/Instance.js
old mode 100755
new mode 100644
diff --git a/lib/ORM.js b/lib/ORM.js
index 254d32f0..a2aeb2dc 100644
--- a/lib/ORM.js
+++ b/lib/ORM.js
@@ -174,6 +174,17 @@ function ORM(driver_name, driver, settings) {
 			this.driver.reconnect(function () {
 				this.driver.on("error", onError);
 			}.bind(this));
+			
+			this.driver.reconnect(function (error) {
+				// if failed try reconnect again after timeout
+				if (error && this.settings.get("connection.reconnectTime")) {
+					setTimeout(function() {
+						onError(error);
+					}, this.settings.get("connection.reconnectTime"));
+				} else {
+					this.driver.on("error", onError);
+				}
+			}.bind(this));
 
 			if (this.listeners("error").length === 0) {
 				// since user want auto reconnect,
diff --git a/lib/Property.js b/lib/Property.js
index c00375ba..4ac923aa 100644
--- a/lib/Property.js
+++ b/lib/Property.js
@@ -3,7 +3,7 @@ var ORMError = require("./Error");
 
 var KNOWN_TYPES = [
 	"text",   "number", "integer", "boolean", "date", "enum", "object",
-	"binary", "point",  "serial"
+	"array", "binary", "point",  "serial"
 ];
 
 exports.normalize = function (opts) {
@@ -24,6 +24,9 @@ exports.normalize = function (opts) {
 			case "Object":
 				opts.prop = { type: "object" };
 				break;
+			case "Array":
+				opts.prop = { type: "array" };
+				break;
 			case "Buffer":
 				opts.prop = { type: "binary" };
 				break;
diff --git a/lib/Settings.js b/lib/Settings.js
index 853a202c..9ec9229e 100644
--- a/lib/Settings.js
+++ b/lib/Settings.js
@@ -21,6 +21,7 @@ var default_settings = {
 	},
 	connection : {
 		reconnect                 : true,
+		reconnectTime             : 10000,
 		pool                      : false,
 		debug                     : false
 	}