You can't just copy/paste this in, you need to rem out the lines that don't apply.
I put these into a config format for our server; you can use the bottom part with all of the help text, or just put what you need from the top part into your server.cfg (just using the top part is cleaner). Make sure you change the cfg lines to what you need for your server. If everything but the freeze time is ok, all you need is the freeze config line in your server.cfg. No need to add extraneous stuff to your cfg.
Code:
sm_medic_enabled 1
sm_medic_health 25
sm_medic_delay 1.0
sm_medic_yell 3.0
sm_medic_ftb 1
sm_medic_freeze 1
sm_medic_freeze_time 5.0
sm_medic_hp 80
sm_medic_kits 2
sm_medic_randomhealth 1
sm_medic_minhealth 30
sm_medic_maxhealth 50
sm_medic_alpha 210
// * sm_medic_enabled
// default: 1
// Allows the plugin to be switched off
sm_medic_enabled 1
//
// * sm_medic_health
// default: 25
// Minimum health before a player can be healed
sm_medic_health 20
//
// * sm_medic_delay 1.0
// default: 1.0
// minimum: 0.1
// Number of seconds before a player gets healed
sm_medic_delay 1.0
//
// * sm_medic_yell 3.0
// default: 3.0
// minimum: 0.1
// The time allowed between calls for the medic. Prevents over-spamming the medic call
sm_medic_yell 3.0
//
// * sm_medic_ftb 1
// default: 1
// When enabled, the player's screen will momentarily fade to black
sm_medic_ftb 1
//
// * sm_medic_freeze 1
// default: 1
// When set, the player is frozen while being healed.
sm_medic_freeze 1
//
// * sm_medic_freeze_time 5.0
// default: 3.0
// minimum: 0.1
// Number of seconds a player is frozen on the spot while being healed
sm_medic_freeze_time 5.0
//
// * sm_medic_hp 80
// default: 100
// Max health of a player at spawn
sm_medic_hp 100
//
// * sm_medic_kits 2
// default: 2
// The number of times a player can heal themselves between spawns. Can be set to a very high number to //disable.
sm_medic_kits 2
//
// * sm_medic_randomhealth 1
// default: 1
// When enabled, a random amount of health is given back to the player. When disabled, it uses //sm_medic_maxhealth
sm_medic_randomhealth 0
//
// * sm_medic_minhealth 30
// default: 30
// The minimum amount of health to give a player during healing
sm_medic_minhealth 50
//
// * sm_medic_maxhealth
// default: 50
// The maximum amount of health to give a player during healing
sm_medic_maxhealth 100
//
// * sm_medic_alpha 210
// default: 210
// The maximum amount of alpha to apply to FTB - the higher the number, the denser the color
sm_medic_alpha 210
//
// * sm_medic_red 0
// default: 0
// The maximum amount of red in FTB
sm_medic_red 0
//
// * sm_medic_green 0
// default: 0
// The maximum amount of green in FTB
sm_medic_green 0
//
// * sm_medic_blue 0
// default: 0
// The maximum amount of blue in FTB
sm_medic_blue 0
//
// * sm_medic_chat 2
// default: 2
// 0 = no chat
// 1 = minimal chat
// 2 = full chat
sm_medic_chat 2