server changing map

hey guys on my gmod server when i try to change the map it just stops at the loading screen saying server changing map but it wont ever change. any help?

[editline]09:46AM[/editline]

also i gave my friends ownership by doing rocn ASS_Giveownership <userid> in console but they still cant use the +ASS_Menu anyone got any ideas?

[editline]09:46AM[/editline]

thats rcon*