Yes thank you again Powerlord. i even used the "fixed"
TF2_RemoveWeaponSlot(client, slot) from tf2_socks just in case, have no errors at compile nor at run time but still have the first spawning guy like not being initialized at all, like not being hooked at player_spawn. He doesn't even get the default runspeed value as i changed it to a slow value just to test and he still runs fast at first spawn with no footsteps sounds.
I've tried million things with player indexes and other hooks, no luck. Could this symptom remind something to someone who knows the game better than me ;)