[server] Finish ErrorMessage decoding code

PixelHub-Server/PixelHub/PixelMessages/ErrorMessage.cs

@@ -23,8 +23,8 @@ namespace PixelHub.Server.PixelMessages
 			protected set {
 				byte[] rawErrorCode = new byte[sizeof(uint)];
 				byte[] rawErrorMessage = new byte[value.Length - sizeof(uint)];
-				ErrorCode = BitConverter.ToUInt32(rawErrorCode);
-				Message = Encoding.UTF8.
+				ErrorCode = BitConverter.ToUInt32(rawErrorCode, 0);
+				Message = new string(Encoding.UTF8.GetChars(rawErrorMessage));
 			}
 		}