Finally got the AT working

build.gradle

@@ -52,6 +52,6 @@ processResources
 jar 
 {
     manifest {
-        attributes 'FMLAT': 'accessTransformer.cfg'
+        attributes 'FMLAT': 'DimDoors_at.cfg'
     }
 }

src/main/java/StevenDimDoors/mod_pocketDim/tileentities/TileEntityDimDoor.java

@@ -10,6 +10,9 @@ import StevenDimDoors.mod_pocketDim.core.DimLink;
 import StevenDimDoors.mod_pocketDim.core.PocketManager;
 
 import StevenDimDoors.mod_pocketDim.watcher.ClientLinkData;
+import net.minecraft.network.NetworkManager;
+import net.minecraft.network.Packet;
+import net.minecraft.network.play.server.S35PacketUpdateTileEntity;
 
 
 public class TileEntityDimDoor extends DDTileEntityBase