diff --git a/src/EpiCache_Memcached.php b/src/EpiCache_Memcached.php
index 42e39c4..98022ff 100644
--- a/src/EpiCache_Memcached.php
+++ b/src/EpiCache_Memcached.php
@@ -10,9 +10,9 @@ class EpiCache_Memcached extends EpiCache
   public function __construct($params = array())
   {
     $this->host = !empty($params[0]) ? $params[0] : 'localhost';
-    $this->port = !empty($params[1]) ? $params[1] : 11211;;
-    $this->compress = !empty($params[2]) ? $params[2] : 0;;
-    $this->expiry   = !empty($params[3]) ? $params[3] : 3600;
+    $this->port = !empty($params[1]) ? $params[1] : 11211;
+    $this->compress = isset($params[2]) ? $params[2] : 0;
+    $this->expiry   = isset($params[3]) ? $params[3] : 3600;
   }
 
   public function delete($key, $timeout = 0)
diff --git a/src/EpiSession_Memcached.php b/src/EpiSession_Memcached.php
index 8ecdae1..fe324fe 100644
--- a/src/EpiSession_Memcached.php
+++ b/src/EpiSession_Memcached.php
@@ -2,21 +2,26 @@
 class EpiSession_Memcached implements EpiSessionInterface
 {
   private static $connected = false;
-  private $key  = null;
-  private $store= null;
+  private $memcached = false;
+  private $key = null;
+  private $store = null;
+  private $host = null;
+  private $port = null;
+  private $compress = null;
+  private $expiry = null;
 
   public function __construct($params = array())
   {
     if(empty($_COOKIE[EpiSession::COOKIE]))
     {
-      $cookieVal = md5(uniqid(rand(), true));
-      setcookie(EpiSession::COOKIE, $cookieVal, time()+1209600, '/');
-      $_COOKIE[EpiSession::COOKIE] = $cookieVal;
+      $key = md5(uniqid(rand(), true));
+      setcookie(EpiSession::COOKIE, $key, time() + 1209600, '/');
+      $_COOKIE[EpiSession::COOKIE] = $key;
     }
     $this->host = !empty($params[0]) ? $params[0] : 'localhost';
-    $this->port = !empty($params[1]) ? $params[1] : 11211;;
-    $this->compress = !empty($params[2]) ? $params[2] : 0;;
-    $this->expiry   = !empty($params[3]) ? $params[3] : 3600;
+    $this->port = !empty($params[1]) ? $params[1] : 11211;
+    $this->compress = isset($params[2]) ? $params[2] : 0;
+    $this->expiry   = isset($params[3]) ? $params[3] : 3600;
   }
 
   public function end()
@@ -51,7 +56,7 @@ public function set($key = null, $value = null)
       return false;
     
     $this->store[$key] = $value;
-    $this->memcached->set($this->key, $this->store);
+    $this->memcached->set($this->key, $this->store, $this->expiry);
     return $value;
   }
 
@@ -66,7 +71,7 @@ private function connect($params = null)
       if($this->memcached->addServer($this->host, $this->port))
       {
         self::$connected = true;
-        $this->key = empty($key) ? $_COOKIE[EpiSession::COOKIE] : $key;
+        $this->key = $_COOKIE[EpiSession::COOKIE];
         $this->store = $this->getAll();
         return true;
       }