diff --git a/Dache.CacheHost/Communication/CacheHostServer.cs b/Dache.CacheHost/Communication/CacheHostServer.cs
index 39f359c..f1e3866 100644
--- a/Dache.CacheHost/Communication/CacheHostServer.cs
+++ b/Dache.CacheHost/Communication/CacheHostServer.cs
@@ -41,6 +41,9 @@ internal class CacheHostServer : ICacheHostContract, IRunnable
         // The logger
         private readonly ILogger _logger;
 
+        // The invalid command string list
+        private readonly List<string> _invalidCommandStringList = new List<string> { "invalid command" };
+
         /// <summary>
         /// The constructor.
         /// </summary>
@@ -103,6 +106,7 @@ public CacheHostServer(IMemCache memCache, ITagRoutingTable tagRoutingTable, ILo
 
             // Hook into received message event
             _server.MessageReceived += ReceiveMessage;
+            _server.Error += (sender, e) => { _logger.Warn("Dache Client Disconnected", e.Exception); };
         }
 
         private void ReceiveMessage(object sender, MessageReceivedArgs e)
@@ -326,6 +330,12 @@ private byte[] ProcessCommand(string command)
                     }
                     break;
                 }
+                default:
+                {
+                    // Invalid command
+                    commandResult = CreateCommandResult(_invalidCommandStringList);
+                    break;
+                }
             }
 
             // Return the result - may be null if there was no valid message
diff --git a/Dache.CacheHost/Dache.CacheHost.csproj b/Dache.CacheHost/Dache.CacheHost.csproj
index fb6d029..5926f41 100644
--- a/Dache.CacheHost/Dache.CacheHost.csproj
+++ b/Dache.CacheHost/Dache.CacheHost.csproj
@@ -48,9 +48,9 @@
     <Reference Include="SharpMemoryCache">
       <HintPath>..\packages\SharpMemoryCache.1.0.0\lib\SharpMemoryCache.dll</HintPath>
     </Reference>
-    <Reference Include="SimplSockets, Version=1.3.0.37244, Culture=neutral, processorArchitecture=MSIL">
+    <Reference Include="SimplSockets, Version=1.3.0.42869, Culture=neutral, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\SimplSockets.1.3.0\lib\SimplSockets.dll</HintPath>
+      <HintPath>..\packages\SimplSockets.1.3.1\lib\SimplSockets.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
diff --git a/Dache.CacheHost/packages.config b/Dache.CacheHost/packages.config
index dbf7cfe..ebff8e0 100644
--- a/Dache.CacheHost/packages.config
+++ b/Dache.CacheHost/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="SharpMemoryCache" version="1.0.0" targetFramework="net45" />
-  <package id="SimplSockets" version="1.3.0" targetFramework="net40" />
+  <package id="SimplSockets" version="1.3.1" targetFramework="net40" />
 </packages>
\ No newline at end of file
diff --git a/Dache.Client/Dache.Client.csproj b/Dache.Client/Dache.Client.csproj
index 2a2b4d8..9250a1a 100644
--- a/Dache.Client/Dache.Client.csproj
+++ b/Dache.Client/Dache.Client.csproj
@@ -40,9 +40,9 @@
     <Reference Include="SharpMemoryCache">
       <HintPath>..\packages\SharpMemoryCache.1.0.0\lib\SharpMemoryCache.dll</HintPath>
     </Reference>
-    <Reference Include="SimplSockets, Version=1.3.0.37244, Culture=neutral, processorArchitecture=MSIL">
+    <Reference Include="SimplSockets, Version=1.3.0.42869, Culture=neutral, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
-      <HintPath>..\packages\SimplSockets.1.3.0\lib\SimplSockets.dll</HintPath>
+      <HintPath>..\packages\SimplSockets.1.3.1\lib\SimplSockets.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.configuration" />
diff --git a/Dache.Client/packages.config b/Dache.Client/packages.config
index dbf7cfe..ebff8e0 100644
--- a/Dache.Client/packages.config
+++ b/Dache.Client/packages.config
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="SharpMemoryCache" version="1.0.0" targetFramework="net45" />
-  <package id="SimplSockets" version="1.3.0" targetFramework="net40" />
+  <package id="SimplSockets" version="1.3.1" targetFramework="net40" />
 </packages>
\ No newline at end of file
diff --git a/Dache.PerformanceTests/RemovedItemCallback/RemovedItemCallbackTest.cs b/Dache.PerformanceTests/RemovedItemCallback/RemovedItemCallbackTest.cs
index a0b3887..77c2042 100644
--- a/Dache.PerformanceTests/RemovedItemCallback/RemovedItemCallbackTest.cs
+++ b/Dache.PerformanceTests/RemovedItemCallback/RemovedItemCallbackTest.cs
@@ -21,7 +21,7 @@ public static void Run()
 
             cacheClient.HostDisconnected += (sender, e) => { Console.WriteLine("*** Host disconnected"); };
             cacheClient.HostReconnected += (sender, e) => { Console.WriteLine("*** Host reconnected"); };
-            cacheClient.CacheItemExpired += (sender, e) => { Interlocked.Increment(ref totalCallbacks); Console.WriteLine(string.Format("Cache key expired: {1}, Total Removed: {1}", e.CacheKey, totalCallbacks)); };
+            cacheClient.CacheItemExpired += (sender, e) => { Interlocked.Increment(ref totalCallbacks); Console.WriteLine(string.Format("Cache key expired: {0}, Total Removed: {1}", e.CacheKey, totalCallbacks)); };
 
             // Add items
             for (int i = 0; i < itemsToAdd; i++)