要配合admin system一起用的

你看一下有没有..\left4dead2\ems\admin system文件夹
里面有两个文件admins.txt和settings.txt

应该是跟执行权限或者文件缺失有关的，我这边在Left 4 Dead 2\left4dead2\cfg目录下新建了一个文件就好了。文件名：autoexec.cfg。文件内容：
// READ THIS CAREFULLY! SEE BOTTOM FOR EXAMPLES
//
// For each admin, you need three settings:
// "identity" "permissions" "password"
//
// For the Identity, you can use a SteamID or Name. To use an IP address, prepend a ! character.
// For the Permissions, you can use a flag string and an optional password.
//
// PERMISSIONS:
// Flag definitions are in "admin_levels.cfg"
// You can combine flags into a string like this:
// "abcdefgh"
//
// If you want to specify a group instead of a flag, use an @ symbol. Example:
// "@full Admins"
//
// You can also specify immunity values. Two examples:
// "83:abcdefgh" //Immunity is 83, flags are abcdefgh
// "6:@Full Admins" //Immunity is 6, group is "Full Admins"
//
// Immunity values can be any number. An admin cannot target an admin with
// a higher access value (see sm_immunity_mode to tweak the rules). Default
// immunity value is 0 (no immunity).
//
// PASSWORDS:
// Passwords are generally not needed unless you have name-based authentication.
// In this case, admins must type this in their console:
//
// setinfo "KEY" "PASSWORD"
//
// Where KEY is the "PassInfoVar" setting in your core.cfg file, and "PASSWORD"
// is their password. With name based authentication, this must be done before
// changing names or connecting. Otherwise, SourceMod will automatically detect
// the password being set.
//
////////////////////////////////
// Examples: (do not put // in front of real lines, as // means 'comment')
//
// "STEAM_0:1:16" "bce" //generic, kick, unban for this steam ID, no immunity
// "!127.0.0.1" "99:z" //all permissions for this ip, immunity value is 99
// "BAILOPAN" "abc" "Gab3n" //name BAILOPAN, password "Gab3n": gets reservation, generic, kick
//
////////////////////////////////
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