diff --git a/shadowsocks-csharp/Controller/ShadowsocksController.cs b/shadowsocks-csharp/Controller/ShadowsocksController.cs
index 3ad0e7bc..2dc33cf2 100644
--- a/shadowsocks-csharp/Controller/ShadowsocksController.cs
+++ b/shadowsocks-csharp/Controller/ShadowsocksController.cs
@@ -220,12 +220,13 @@ namespace Shadowsocks.Controller
             SaveConfig(_config);
         }
 
-        public void EnableProxy(int type, string proxy, int port)
+        public void EnableProxy(int type, string proxy, int port, int timeout)
         {
             _config.proxy.useProxy = true;
             _config.proxy.proxyType = type;
             _config.proxy.proxyServer = proxy;
             _config.proxy.proxyPort = port;
+            _config.proxy.proxyTimeout = timeout;
             SaveConfig(_config);
         }
 
@@ -388,16 +389,6 @@ namespace Shadowsocks.Controller
             }
         }
 
-        public void SaveProxyConfig(ProxyConfig newConfig)
-        {
-            _config.proxy = newConfig;
-            Configuration.Save(_config);
-            if (ConfigChanged != null)
-            {
-                ConfigChanged(this, new EventArgs());
-            }
-        }
-
         public void SaveHotkeyConfig(HotkeyConfig newConfig)
         {
             _config.hotkey = newConfig;
diff --git a/shadowsocks-csharp/View/ProxyForm.cs b/shadowsocks-csharp/View/ProxyForm.cs
index 81e92aa5..c178900a 100644
--- a/shadowsocks-csharp/View/ProxyForm.cs
+++ b/shadowsocks-csharp/View/ProxyForm.cs
@@ -58,35 +58,25 @@ namespace Shadowsocks.View
 
         private void OKButton_Click(object sender, EventArgs e)
         {
-            var type = ProxyTypeComboBox.SelectedIndex;
-            var proxy = ProxyServerTextBox.Text;
-            var port = 0;
-            var timeout = 3;
 
             if (UseProxyCheckBox.Checked)
             {
-                try
-                {
-                    port = int.Parse(ProxyPortTextBox.Text);
-                }
-                catch (FormatException)
+                int port;
+                int timeout;
+                if (!int.TryParse(ProxyPortTextBox.Text, out port))
                 {
                     MessageBox.Show(I18N.GetString("Illegal port number format"));
-                    ProxyPortTextBox.Clear();
                     return;
                 }
 
-                try
-                {
-                    timeout = int.Parse(ProxyTimeoutTextBox.Text);
-                }
-                catch (FormatException)
+                if (!int.TryParse(ProxyTimeoutTextBox.Text, out timeout))
                 {
                     MessageBox.Show(I18N.GetString("Illegal timeout format"));
-                    ProxyTimeoutTextBox.Clear();
                     return;
                 }
 
+                var type = ProxyTypeComboBox.SelectedIndex;
+                var proxy = ProxyServerTextBox.Text;
                 try
                 {
                     Configuration.CheckServer(proxy);
@@ -99,20 +89,13 @@ namespace Shadowsocks.View
                     return;
                 }
 
-                controller.EnableProxy(type, proxy, port);
+                controller.EnableProxy(type, proxy, port, timeout);
             }
             else
             {
                 controller.DisableProxy();
             }
 
-            _modifiedConfiguration.useProxy = UseProxyCheckBox.Checked;
-            _modifiedConfiguration.proxyType = type;
-            _modifiedConfiguration.proxyServer = proxy;
-            _modifiedConfiguration.proxyPort = port;
-            _modifiedConfiguration.proxyTimeout = timeout;
-            controller.SaveProxyConfig(_modifiedConfiguration);
-
             this.Close();
         }
 
@@ -142,9 +125,6 @@ namespace Shadowsocks.View
             }
             else
             {
-                ProxyServerTextBox.Clear();
-                ProxyPortTextBox.Clear();
-                ProxyTimeoutTextBox.Clear();
                 ProxyServerTextBox.Enabled = false;
                 ProxyPortTextBox.Enabled = false;
                 ProxyTimeoutTextBox.Enabled = false;