I could not join my friend in multiplayer mode.

I could not enter the multiplayer mode. It always says Connecting to the server, but later on it says connection timed out. When my friend observed my status, when I try to enter, he told me that I was still online, but when the "connecting" went too long, for like 20 seconds, I became offline in his list. Please fix this bug. Thank you so much. This game is awesome, just please do something about this bug thank you.