About making own channel on voice box

[Sintan]

I would make the name,added a pic.
But when Id hit okay, it keeps saying "Denied: Invalid channel name"
What am I doing wrong? does it have something to do with the position box?

 

[darkangel76]

It could be that it's too long or it could be you're trying to use symbols and characters that aren't letters. Mumble doesn't allow for apostrophes, for example.