diff --git a/gulliver/thirdparty/creole/drivers/mssql/MSSQLConnection.php b/gulliver/thirdparty/creole/drivers/mssql/MSSQLConnection.php
index f3bea1b28..2ed187a73 100755
--- a/gulliver/thirdparty/creole/drivers/mssql/MSSQLConnection.php
+++ b/gulliver/thirdparty/creole/drivers/mssql/MSSQLConnection.php
@@ -74,13 +74,14 @@ class MSSQLConnection extends ConnectionCommon implements Connection {
         } else {
             $portDelimiter = ":";
         }
-       
-        if(!empty($dsninfo['port'])) {
-                $dbhost .= $portDelimiter.$dsninfo['port'];
-        } else {
-                $dbhost .= $portDelimiter.'1433';
-        }
-		
+
+          if(!empty($dsninfo['port'])) {
+                  $dbhost .= $portDelimiter.$dsninfo['port'];
+          } else {
+            if(!strpos($dbhost, "\\")){
+                  $dbhost .= $portDelimiter.'1433';
+            }
+          }
         $connect_function = $persistent ? 'mssql_pconnect' : 'mssql_connect';
 
         if ($dbhost && $user && $pw) {
diff --git a/workflow/engine/classes/class.net.php b/workflow/engine/classes/class.net.php
index 802923b6d..6eaf59799 100755
--- a/workflow/engine/classes/class.net.php
+++ b/workflow/engine/classes/class.net.php
@@ -16,6 +16,7 @@ class NET
   private $db_passwd;
   private $db_sourcename;
   private $db_port;
+  private $db_instance;
 
   /*errors handle*/
   public $error;
@@ -31,6 +32,7 @@ class NET
   {
     $this->errno = 0;
     $this->errstr = "";
+    $this->db_instance = "";
   
     unset($this->db_user);
     unset($this->db_passwd);
@@ -52,16 +54,23 @@ class NET
   */
   function resolv($pHost)
   {
-    if ($this->is_ipaddress($pHost)) {
-      $this->ip = $pHost;
-      if (!$this->hostname = @gethostbyaddr($pHost)) {
+    $aHost = explode("\\", $pHost);
+    if(count($aHost)>1){
+      $ipHost = $aHost[0];
+      $this->db_instance = $aHost[1];
+    } else {
+      $ipHost = $pHost;
+    }
+    if ($this->is_ipaddress($ipHost)) {
+      $this->ip = $ipHost;
+      if (!$this->hostname = @gethostbyaddr($ipHost)) {
         $this->errno = 2000;
         $this->errstr = "NET::Host down";
         $this->error = "Destination Host Unreachable";
       }
     } 
     else {
-      $ip   = @gethostbyname($pHost);
+      $ip   = @gethostbyname($ipHost);
       $long = ip2long($ip);
       if ( $long == -1 || $long === FALSE)  {
         $this->errno = 2000;
@@ -69,7 +78,7 @@ class NET
         $this->error = "Destination Host Unreachable";
       } 
       else {
-        $this->ip = @gethostbyname($pHost);
+        $this->ip = @gethostbyname($ipHost);
         $this->hostname = $pHost;
       }
     }
@@ -219,9 +228,14 @@ class NET
           break;
     
         case 'mssql':
-          $str_port = (($this->db_port == "") || ($this->db_port == 0) || ($this->db_port == 1433)) ? "" : ":".$this->db_port;
-          $link = @mssql_connect($this->ip . $str_port, $this->db_user, $this->db_passwd);
-    
+          if($this->db_instance != ""){
+            $str_port = "";
+            $link = @mssql_connect($this->ip . "\\". $this->db_instance, $this->db_user, $this->db_passwd);
+          } else {
+            $str_port = (($this->db_port == "") || ($this->db_port == 0) || ($this->db_port == 1433)) ? "" : ":".$this->db_port;
+            $link = @mssql_connect($this->ip . $str_port, $this->db_user, $this->db_passwd);
+          }
+
           if ($link) {
             $stat->status = 'SUCCESS';
             $this->errstr = "";
@@ -339,8 +353,15 @@ class NET
           break;
   
         case 'mssql':
-          $str_port = (($this->db_port == "")  || ($this->db_port == 0) || ($this->db_port == 1433)) ? "" : ":".$this->db_port;
-          $link = @mssql_connect($this->ip . $str_port, $this->db_user, $this->db_passwd);
+//          $str_port = (($this->db_port == "")  || ($this->db_port == 0) || ($this->db_port == 1433)) ? "" : ":".$this->db_port;
+//          $link = @mssql_connect($this->ip . $str_port, $this->db_user, $this->db_passwd);
+          if($this->db_instance != ""){
+            $str_port = "";
+            $link = @mssql_connect($this->ip . "\\". $this->db_instance, $this->db_user, $this->db_passwd);
+          } else {
+            $str_port = (($this->db_port == "") || ($this->db_port == 0) || ($this->db_port == 1433)) ? "" : ":".$this->db_port;
+            $link = @mssql_connect($this->ip . $str_port, $this->db_user, $this->db_passwd);
+          }
           if ($link) {
             $db = @mssql_select_db($this->db_sourcename, $link);
             if ($db) {
diff --git a/workflow/engine/methods/dbConnections/dbConnectionsAjax.php b/workflow/engine/methods/dbConnections/dbConnectionsAjax.php
index 6bd8cd076..dfb1cb664 100755
--- a/workflow/engine/methods/dbConnections/dbConnectionsAjax.php
+++ b/workflow/engine/methods/dbConnections/dbConnectionsAjax.php
@@ -147,6 +147,8 @@ switch ( $action ){
 
 		$oDBSource = new DbSource();
 		$oContent = new Content();
+		if(strpos($_POST['server'], "\\"))
+			$_POST['port'] = 'none';
 		$aData = Array(
 			'DBS_UID' => $_POST['dbs_uid'],
 			'PRO_UID' => $_SESSION['PROCESS'],
@@ -168,6 +170,8 @@ switch ( $action ){
 
 		$oDBSource = new DbSource();
 		$oContent = new Content();
+		if(strpos($_POST['server'], "\\"))
+			$_POST['port'] = 'none';
 		$aData = Array(
 			'PRO_UID' => $_SESSION['PROCESS'],
 			'DBS_TYPE' => $_POST['type'],
diff --git a/workflow/engine/methods/dbConnections/genericDbConnections.php b/workflow/engine/methods/dbConnections/genericDbConnections.php
index f1f020a05..125e08f7e 100755
--- a/workflow/engine/methods/dbConnections/genericDbConnections.php
+++ b/workflow/engine/methods/dbConnections/genericDbConnections.php
@@ -13,7 +13,11 @@ if( isset($_SESSION['PROCESS']) ){
         $db['DBS_PASSWORD'] = $oDbConnections->getPassWithoutEncrypt($db);
         $dbsPort = ($db['DBS_PORT'] == '') ? ('') : (':'.$db['DBS_PORT']);
         $ENCODE = (trim($db['DBS_ENCODE']) == '')? '': '?encoding=' . $db['DBS_ENCODE'];
-        $pro['datasources'][$db['DBS_UID']]['connection'] = $db['DBS_TYPE'] . '://' . $db['DBS_USERNAME'] . ':' . $db['DBS_PASSWORD'] . '@' . $db['DBS_SERVER'] .$dbsPort. '/' . $db['DBS_DATABASE_NAME'] . $ENCODE;
+        if(strpos($db['DBS_SERVER'], "\\")  && $db['DBS_TYPE'] == 'mssql'){
+          $pro['datasources'][$db['DBS_UID']]['connection'] = $db['DBS_TYPE'] . '://' . $db['DBS_USERNAME'] . ':' . $db['DBS_PASSWORD'] . '@' . $db['DBS_SERVER'] . '/' . $db['DBS_DATABASE_NAME'] . $ENCODE;
+        } else {
+          $pro['datasources'][$db['DBS_UID']]['connection'] = $db['DBS_TYPE'] . '://' . $db['DBS_USERNAME'] . ':' . $db['DBS_PASSWORD'] . '@' . $db['DBS_SERVER'] .$dbsPort. '/' . $db['DBS_DATABASE_NAME'] . $ENCODE;
+        }
         $pro['datasources'][$db['DBS_UID']]['adapter'] = $db['DBS_TYPE'];
     }
     return $pro;