how to lock FPS_MAX value

[gamesfirst]

(07-01-2010, 10:13 AM)Monk Wrote:  +fps_max 250 +alias fps_max echo "Disabled"

thanks for your answer, but it doesnt work:

Quote:21:31:31 stats
21:31:31 CPU In Out Uptime Users FPS Players
0.00 0.00 0.00 0 0 233.97 0

21:32:11 sm_cvar fps_max 600
21:32:11 [SM] Changed cvar "fps_max" to "600".
21:32:11 L 06/30/2010 - 21:42:00: [basecommands.smx] "Console<0><Console><Console>" changed cvar (cvar "fps_max") (value "600")

21:32:20 stats
21:32:20 CPU In Out Uptime Users FPS Players
0.00 0.00 0.00 1 0 464.04 0

am i doing something wrong?