Well.. this works for me everytime i try.. so lil tut :1) go to inventory
2) Tick every weapon u want to turn into forcepack
3) Tick ready button
4) Go back to Server Selection Screen
5) Press what server u want to join
6) Press YES on that dial box that shows
7) Wait until the dial box "It surely worked" but dont press OK right when it opens wait untill u will have the Channel Selection Server open and then press "OK"
8) Have fun playing with forcepacks

And FOLLOW the next step
9) Press Thanx