diff --git a/Programs/GridProxy/GridProxy.cs b/Programs/GridProxy/GridProxy.cs
index c894d519..8a33911f 100644
--- a/Programs/GridProxy/GridProxy.cs
+++ b/Programs/GridProxy/GridProxy.cs
@@ -1365,6 +1365,7 @@ namespace GridProxy
 
             for (int i = 0; i < packet.Header.AckList.Length; ++i)
             {
+                seperate.Packets[i] = new PacketAckPacket.PacketsBlock();
                 seperate.Packets[i].ID = packet.Header.AckList[i];
             }