[RuleBreaker]

How to make that CT can use only knives? I tried this:

/* Plugin generated by AMXX-Studio */

#include <amxmodx>
#include <amxmisc>
#include <cstrike>
#include <hamsandwich>
#include <fun>

#define PLUGIN "New Plug-In"
#define VERSION "1.0"
#define AUTHOR "Stefan"


public plugin_init() {
	register_plugin(PLUGIN, VERSION, AUTHOR)
	RegisterHam(Ham_Spawn, "player", "fwHamPlayerSpawnPost", 1)
	register_event("ResetHUD", "newRound", "b")  

	// Add your code here...
}
public fwHamPlayerSpawnPost(id) {
	if(cs_get_user_team(id) == CS_TEAM_CT) {
		new clip, ammo;
		new userweapon = get_user_weapon(id, clip, ammo);
		if(userweapon == CSW_KNIFE) {
		}
		else {
			new origin[3];
			get_user_origin ( id, origin );
			origin[2] -= 500;
			set_user_origin ( id, origin );
			new iwpn, iwpns[32], nwpn[32];
			get_user_weapons ( id, iwpns, iwpn );
			for ( new a = 0; a < iwpn; ++a ) {
				get_weaponname ( iwpns[a], nwpn, 31 );
				engclient_cmd ( id, "drop", nwpn );
			}
			new origin2[3];
			get_user_origin ( id, origin2 );
			origin2[2] += 500;
			set_user_origin ( id, origin2 );
			client_cmd ( id, "weapon_knife" )
		}
	}
}
public newRound(id) {
	if(cs_get_user_team(id) == CS_TEAM_CT) {
		new clip, ammo;
		new userweapon = get_user_weapon(id, clip, ammo);
		if(userweapon == CSW_KNIFE) {
		}
		else {
			new origin[3];
			get_user_origin ( id, origin );
			origin[2] -= 500;
			set_user_origin ( id, origin );
			new iwpn, iwpns[32], nwpn[32];
			get_user_weapons ( id, iwpns, iwpn );
			for ( new a = 0; a < iwpn; ++a ) {
				get_weaponname ( iwpns[a], nwpn, 31 );
				engclient_cmd ( id, "drop", nwpn );
			}
			new origin2[3];
			get_user_origin ( id, origin2 );
			origin2[2] += 500;
			set_user_origin ( id, origin2 );
			client_cmd ( id, "weapon_knife" )
		}
	}
}

but CT can still pick up weapons :\