diff --git a/lib/fdfs.js b/lib/fdfs.js
index 7c7f9c2..a7087db 100644
--- a/lib/fdfs.js
+++ b/lib/fdfs.js
@@ -292,25 +292,6 @@ function _normalizeUploadParams(file, options) {
             return;
         }
 
-        if (is.string(file)) {
-            fs.stat(file, function(err, stats) {
-                if (err || !stats) {
-                    reject(new Error('File [' + file + '] is not exists!'));
-                    return;
-                }
-
-                options.size = stats.size;
-                if (!options.ext) {
-                    options.ext = path.extname(file);
-                    if (options.ext) {
-                        // 去掉.
-                        options.ext = options.ext.substring(1);
-                    }
-                }
-                resolve();
-            });
-            return;
-        }
 
         if (is.readableStream(file) && !options.size) {
             reject(new Error('when the "file" parameter\'s is ReadableStream, options.size must specified'));
@@ -348,6 +329,19 @@ function _normalizeUploadParams(file, options) {
                 reject(new Error('options.offset must be a number'));
             }
         }
+
+        if (is.string(file)) {
+            var stats = fs.statSync(file);
+            options.size = stats.size;
+            if (!options.ext) {
+                options.ext = path.extname(file);
+                if (options.ext) {
+                    // 去掉.
+                    options.ext = options.ext.substring(1);
+                }
+            }
+            resolve();
+        }
         resolve();
     });
 
diff --git a/lib/storage.js b/lib/storage.js
index 689f5df..6af4918 100644
--- a/lib/storage.js
+++ b/lib/storage.js
@@ -281,10 +281,8 @@ Storage.prototype.upload = function(file, options) {
         return this._appendFile(file, options);
     } else if (options.method === protocol.FDFS_METHOD_MODIFY_FILE) {
         return this._modifyFile(file, options);
-    } else {
-        var err = new Error("options.method must in ['upload', 'uploadAppender', 'append', 'modify'] ");
-        throw err;
     }
+    return Promise.reject(new Error("options.method must in ['upload', 'uploadAppender', 'append', 'modify'] "));
 };
 
 /**
diff --git a/package.json b/package.json
index e9e7a03..91d509c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fdfs",
-  "version": "0.9.0",
+  "version": "0.9.1",
   "description": "FastDFS node client",
   "main": "index.js",
   "scripts": {
diff --git a/test/FdfsTest.js b/test/FdfsTest.js
index 37acb70..d93651c 100644
--- a/test/FdfsTest.js
+++ b/test/FdfsTest.js
@@ -7,7 +7,7 @@ var FdfsClient = require('../index.js');
 var fdfs = new FdfsClient({
     trackers: [
         {
-            host: '192.168.0.11',
+            host: '192.168.0.120',
             port: 22122
         },
         {