diff -Nuar amazons3-ori/AmazonS3StreamWrapper.inc amazons3/AmazonS3StreamWrapper.inc
--- amazons3-ori/AmazonS3StreamWrapper.inc	2012-04-21 22:24:13.000000000 +0800
+++ amazons3/AmazonS3StreamWrapper.inc	2013-11-11 17:27:13.000000000 +0800
@@ -916,6 +916,10 @@
       else {
         try {
          $this->s3 = new AmazonS3();
+         $this->s3->set_region(variable_get('amazons3_region', AmazonS3::REGION_US_E1));
+         if (strpos($bucket, '.') !== FALSE) {
+           $this->s3->enable_path_style();
+         }
          $this->bucket = $bucket;
         }
         catch(RequestCore_Exception $e){
diff -Nuar amazons3-ori/amazons3.module amazons3/amazons3.module
--- amazons3-ori/amazons3.module	2012-04-21 22:24:13.000000000 +0800
+++ amazons3/amazons3.module	2013-11-11 17:25:31.000000000 +0800
@@ -58,6 +58,15 @@
 function amazons3_admin() {
   $form = array();
 
+  $library = libraries_load('awssdk');
+  if(!$library['loaded']) {
+    drupal_set_message(t('Unable to load the AWS SDK. Please check you have installed the library correctly and configured your S3 credentials.'), 'warning');
+    return $form;
+  }
+  else if(!class_exists('AmazonS3')) {
+    drupal_set_message(t('Cannot load AmazonS3 class. Please check the awssdk is installed correctly'), 'warning');
+    return $form;
+  }
+
   $form['amazons3_bucket'] = array(
       '#type'           => 'textfield',
       '#title'          => t('Default Bucket Name'),
@@ -65,6 +74,23 @@
       '#required'       => TRUE,
   );
 
+  $form['amazons3_region'] = array(
+    '#type' => 'select',
+    '#title' => t('Bucket region'),
+    '#default_value' => variable_get('amazons3_region', AmazonS3::REGION_US_E1),
+    '#required' => true,
+    '#options' => array(
+      AmazonS3::REGION_US_E1 => t('US Standard'),
+      AmazonS3::REGION_US_W1 => t('US West (Oregon) Region'),
+      AmazonS3::REGION_US_W2 => t('US West (Northern California) Region'),
+      AmazonS3::REGION_EU_W1 => t('EU (Ireland) Region'),
+      AmazonS3::REGION_APAC_SE1 => t('Asia Pacific (Singapore) Region'),
+      AmazonS3::REGION_APAC_SE2 => t('Asia Pacific (Sydney) Region'),
+      AmazonS3::REGION_APAC_NE1 => t('Asia Pacific (Tokyo) Region'),
+      AmazonS3::REGION_SA_E1 => t('South America (Sao Paulo) Region'),
+    ),
+  );
+
   $form['amazons3_cache'] = array(
     '#type'           => 'checkbox',
     '#title'          => t('Enable database caching'),
@@ -141,6 +167,10 @@
   else {
     try {
       $s3 = new AmazonS3();
+      $s3->set_region($form_state['values']['amazons3_region']);
+      if (strpos($bucket, '.') !== FALSE) {
+        $s3->enable_path_style();
+      }
       // test connection
       $user_id = $s3->get_canonical_user_id();
       if(!$user_id['id']) {