Help plz, cant add maps!!!

[Quak3]

[/size] Hi im quak3 , i would like some one to help me whit maps.

[size=medium] I downloaded maps from http://www.garrysmod.org,
and i puted them in C:\srcds\orangebox\garrysmod\maps.
When i try to change them in game i get all kinds of Bps. errors
tryd so much ways , just culdent fix it . So plz make my day and Help me out <3

[Mike]

Post the errors you get.