diff --git a/Client/Client.csproj b/Client/Client.csproj
index d4f0c02..5df9c6a 100644
--- a/Client/Client.csproj
+++ b/Client/Client.csproj
@@ -27,7 +27,7 @@
     <UpdateUrl>http://www.ygh.kr/ost/</UpdateUrl>
     <CreateWebPageOnPublish>true</CreateWebPageOnPublish>
     <WebPage>index.html</WebPage>
-    <ApplicationRevision>3</ApplicationRevision>
+    <ApplicationRevision>4</ApplicationRevision>
     <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
     <UseApplicationTrust>false</UseApplicationTrust>
     <CreateDesktopShortcut>true</CreateDesktopShortcut>
diff --git a/Client/Forms/FormLogin.cs b/Client/Forms/FormLogin.cs
index 3149a3f..daa199c 100644
--- a/Client/Forms/FormLogin.cs
+++ b/Client/Forms/FormLogin.cs
@@ -101,7 +101,7 @@ private void btnLogin_Click(object sender, EventArgs e)
             }
             else
             {
-                lblResult.Style = MetroFramework.MetroColorStyle.Red;
+                lblResult.Style = MetroColorStyle.Red;
                 lblResult.Text = "서버와 연결 되어있지 않습니다.";
             }
         }
@@ -154,7 +154,7 @@ public void EndConnect(IAsyncResult result)
                     MetroColorStyle.Red;
                 lblResult.Text = resultText;
 
-                if (savedLoginInfo.Contains("\n"))
+                if (Program.client.Connected && savedLoginInfo.Contains("\n"))
                 {
                     txtEmpId.Text = savedLoginInfo.Split('\n')[0];
                     txtPassword.Text = savedLoginInfo.Split('\n')[1];
diff --git a/Client/Program.cs b/Client/Program.cs
index f2e2a3b..38ac37e 100644
--- a/Client/Program.cs
+++ b/Client/Program.cs
@@ -16,7 +16,7 @@ static class Program
         public static object locker = new object();                     // 송신 뮤택스
         public static TcpClient client;                                 // 서버와 연결된 TCP 소켓
         public static NetworkStream ns;                                 // 네트워크 스트림
-        public static readonly string hostname = "127.0.0.1";           // 접속할 서버 주소
+        public static string hostname;                                  // 접속할 서버 주소
         public static readonly ushort port = 6756;                      // 접속할 서버 포트
         public static Thread recvThread;                                // 서버로부터 수신을 대기하는 스레드
         public static Dictionary<PacketType, Action<Packet>> callback;  // 타입에 따른 콜백 메소드
@@ -33,6 +33,10 @@ static void Main()
             recvThread = new Thread(new ThreadStart(Recieve));
             callback = new Dictionary<PacketType, Action<Packet>>();
 
+            string[] args = Environment.GetCommandLineArgs();
+            hostname = args.Length > 1 ? args[1] : "www.ygh.kr";
+
+
             Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
             Application.Run(formMain = new FormMain());