ADMIN MENU ZP with limit in time

please help me for complety this.. i try in this menu and no work, please how add the limit here:

// Admin Menu
public menu_admin(id, key)
{
static userflags
userflags = get_user_flags(id)

switch (key)
{
case ACTION_ZOMBIEFY_HUMANIZE: // Zombiefy/Humanize command
{
if (userflags & (g_access_flag[ACCESS_MODE_INFECTION] | g_access_flag[ACCESS_MAKE_ZOMBIE] | g_access_flag[ACCESS_MAKE_HUMAN]))
{
// Show player list for admin to pick a target
PL_ACTION = ACTION_ZOMBIEFY_HUMANIZE
show_menu_player_list(id)
}
else
{
zp_colored_print(id, "^x04[ZP]^x01 %L", id, "CMD_NOT_ACCESS")
show_menu_admin(id)
}
}
case ACTION_MAKE_NEMESIS: // Nemesis command
{
if (userflags & (g_access_flag[ACCESS_MODE_NEMESIS] | g_access_flag[ACCESS_MAKE_NEMESIS]))
{
// Show player list for admin to pick a target
PL_ACTION = ACTION_MAKE_NEMESIS
show_menu_player_list(id)
}
else
{
zp_colored_print(id, "^x04[ZP]^x01 %L", id, "CMD_NOT_ACCESS")
show_menu_admin(id)
}
}
case ACTION_MAKE_SURVIVOR: // Survivor command
{
if (userflags & (g_access_flag[ACCESS_MODE_SURVIVOR] | g_access_flag[ACCESS_MAKE_SURVIVOR]))
{
// Show player list for admin to pick a target
PL_ACTION = ACTION_MAKE_SURVIVOR
show_menu_player_list(id)
}
else
{
zp_colored_print(id, "^x04[ZP]^x01 %L", id, "CMD_NOT_ACCESS")
show_menu_admin(id)
}
}
case ACTION_MAKE_SNIPER: // Sniper command
{
if (userflags & (g_access_flag[ACCESS_MODE_SNIPER] | g_access_flag[ACCESS_MAKE_SNIPER]))
{
// Show player list for admin to pick a target
PL_ACTION = ACTION_MAKE_SNIPER
show_menu_player_list(id)
}
else
{
zp_colored_print(id, "^x04[ZP]^x01 %L", id, "CMD_NOT_ACCESS")
show_menu_admin(id)
}
}
case ACTION_MAKE_ASSASSIN: // Assassin command
{
if (userflags & (g_access_flag[ACCESS_MODE_ASSASSIN] | g_access_flag[ACCESS_MAKE_ASSASSIN]))
{
// Show player list for admin to pick a target
PL_ACTION = ACTION_MAKE_ASSASSIN
show_menu_player_list(id)
}
else
{
zp_colored_print(id, "^x04[ZP]^x01 %L", id, "CMD_NOT_ACCESS")
show_menu_admin(id)
}
}
case ACTION_RESPAWN_PLAYER: // Respawn command
{
if (userflags & g_access_flag[ACCESS_RESPAWN_PLAYERS])
{
// Show player list for admin to pick a target
PL_ACTION = ACTION_RESPAWN_PLAYER
show_menu_player_list(id)
}
else
{
zp_colored_print(id, "^x04[ZP]^x01 %L", id, "CMD_NOT_ACCESS")
show_menu_admin(id)
}
}
case 9: // Chose to return
{
show_menu3_admin(id)
}
}
return PLUGIN_HANDLED;
}


i have limit in:

admin menu (have limit)

1) add class or respawn a player (have limit)
2) start a mode (have limit)
3) costom modes (have limit)

but the admin if dont closed the menu 1) add class or respawn player, can give class zm , human, survifor, etc.. much times. i want the limit here but no work.. error error and error :/ i try all, please help.