mumble-VoIP only can talk in cars

hey, im having a problem with my mumble-VoIP, and i was wondering if someone can help me with it. i use zap hosting btw, and i can only talk to people when i am in the same car with them.
and help?

I found the problem, for me it was Lambda Menu but it can be other scripts like esx_voice which are the reason for the problem and sorry for my bad English.

Have you checked onesync is on? I think in zap hosting its turned off by default.

check you vmenu permission