the tacopack takes way to long to load/download the terrain i should say it doesn't even load at all
1.2 Is working with server, but it doesn't have the mods like NEI, I will update it tomorrow.
1.1 client is broken, it is missing a few mods on the server, however 1.2 is just uploading now, so I will push the update in a couple of minutes.
Good news, 1.2 now comes with both a Vanilla and a Cauldron server, so I will put those together.