Sorry if this is the wrong section.
I'm having a problem with my Tekkit server, that I'm just hosting for me and my friends. Running the 1.0.6 server files, as it comes standard. EE3 blocks, MystCraft blocks, any space/moon related blocks etc. simply disappear when I try to place them. Might be other mods also.
They just get placed on the ground for about 0.01 seconds, and then disappear again; both from the ground and my inventory. Is there something I have to do to enable this? Because I see servers running them all perfectly fine.
EDIT1: Every single box from pretty much every mod disappears. Does not work at all. Help?
FIXED: Had to launch the serverlauncher named "Tekkit", and not the regular minecraft-server one. Sorry.