In the last big steam update, they removed the ability to exec commands on the client. ma_cexec shouldn't work at all anymore, so sadly this method can't be used.
I don't know anymore methods off-hand, but SourceMod may have a way
http://forums.alliedmods.net would also be a good place to ask.
I don't know anymore methods off-hand, but SourceMod may have a way
http://forums.alliedmods.net would also be a good place to ask.