diff --git a/Program.cs b/Program.cs
index a0f9168..3388131 100644
--- a/Program.cs
+++ b/Program.cs
@@ -13,7 +13,7 @@ namespace DualScreenDemo
         private static PrimaryForm primaryForm; // 儲存實例的參考
         public static Room room = new Room();
 
-        public static string verSion = "Server V2.8 202508111732";
+        public static string verSion = "Server V2.8 202508111757";
 
         [STAThread]
         static void Main()
diff --git a/Services/MediaServicePrimary.cs b/Services/MediaServicePrimary.cs
index cd9f62e..12081ad 100644
--- a/Services/MediaServicePrimary.cs
+++ b/Services/MediaServicePrimary.cs
@@ -50,6 +50,7 @@ namespace DualScreenDemo.Services
                 videoRenderer = AddFilterByClsid(graphBuilder, "Primary Video Renderer", Clsid.VideoRenderer);
                 hr = graphBuilder.AddFilter(videoRenderer, "Primary Video Renderer");
                 DsError.ThrowExceptionForHR(hr);
+                mediaControl = (IMediaControl)graphBuilder;
 
                 hr = ConnectFilters(graphBuilder, sourceFilter, "Output", lavSplitter, "Input");
                 DsError.ThrowExceptionForHR(hr);