diff --git a/src/Handlers/ProtoBufferDecoder.php b/src/Handlers/ProtoBufferDecoder.php
index a8bb4a8..74e0440 100755
--- a/src/Handlers/ProtoBufferDecoder.php
+++ b/src/Handlers/ProtoBufferDecoder.php
@@ -1,22 +1,6 @@
 <?php
 namespace Aliyun\OTS\Handlers;
 
-use CreateTableResponse;
-use ListTableResponse;
-use DeleteTableResponse;
-use DescribeTableResponse;
-use UpdateTableResponse;
-use GetRowResponse;
-use PutRowResponse;
-use UpdateRowResponse;
-use DeleteRowResponse;
-use BatchGetRowResponse;
-use BatchWriteRowResponse;
-use GetRangeResponse;
-
-use ColumnType; 
-
-
 class ProtoBufferDecoder
 {
     public function handleBefore($context)
diff --git a/src/ProtoBuffer/pb_message.php b/src/ProtoBuffer/pb_message.php
index b80651f..ce487dc 100755
--- a/src/ProtoBuffer/pb_message.php
+++ b/src/ProtoBuffer/pb_message.php
@@ -221,7 +221,8 @@ private function _ParseFromArray($length=99999999)
             }
             else
             {
-                $this->values[$messtypes['field']] = new $this->fields[$messtypes['field']]($this->reader);
+                $method = 'Aliyun\\OTS\\Handlers\\'.$this->fields[$messtypes['field']];
+                $this->values[$messtypes['field']] = new $method($this->reader);
                 if ($messtypes['wired'] != $this->values[$messtypes['field']]->wired_type)
                 {
                     throw new Exception('Expected type:' . $messtypes['wired'] . ' but had ' . $this->fields[$messtypes['field']]->wired_type);
@@ -273,7 +274,8 @@ protected function _set_value($index, $value)
         }
         else
         {
-            $this->values[$index] = new $this->fields[$index]();
+            $method = 'Aliyun\\OTS\\Handlers\\' . $this->fields[$index];
+            $this->values[$index] = new $method();
             $this->values[$index]->value = $value;
         }
     }