changing map for 'friendly fire'

so i'm trying to change the map when i'm on the fishing boat and everytime i change the map it gives me a black screen. it shows a loading bar then a black screen... any idea what i'm doing wrong?

i'm typing in changemap (The_Giant) as example. Is there certain instructions i need to do ?

edit: Nobody else is on the boat except me. i'm using pies binds v2.1, old pubcon by hell demon and nico and god/ohk

right now the fishlist are really clean. I like it like this :'3
yep map name fail, that is all i want to say.
please set on private +kiss