Counter Strike Source Deathmatch : FREE FOR ALL SEVER

okay so this has nothign to do with teh copmmunity, but i wasnte to ask if anyone knows how to setup a cssdm server and get free for all working.

i ahve my server running nicley at work and everthing works fine from zombie mod to gun game to deathmatch, but one thing thats important for fridays tournament is deathmatch free for all.

I CANT GET IT WORKING

you type the command in (cssdm_ffa_enabled 1)....

and nothing changes.

ive tried adding it to the cfg file 2 and it still doesnt work. :/

ive also tried instaling it on anotehr computer but the same problem happens...

Any ideas?