When I'm trying to fly to another planet in MULTILAYER, it says that my rocket LvL is too low and all LvL indicators are red, I can't even fly back at earth, [I was using LvL 8 rocket]. But in singleplayer everything works fine. And in LAN game only server host can fly to other planets.

version?

Galaxy space 1.1.6
Galactic craft 502, but when I used 501 it didn't work too.
Minecraft 1.7.10