AlliedModders - Crossbow v2.1

Hello, can someone help me with a question?
i set the cvar "amx_crossbow_admin", "1", so that only players with ADMIN_LEVEL_H (the vips) can have the crossbow, this prevents other players from buying the crossbow, but they can still pick it up from the ground when a vip dies or drop the crossbow.
i want to prevent players from getting the crossbow from the ground, but still allow vips to get it from the ground.

I tried this, but with no effect, players can still pick up and use the crossbow

Code:

// Touch

public crossbow_touch(xbow, id)

{

        if(!(get_user_flags(id) & BUY_FLAG) && g_admin == 1)

        {

                // Prevent invalid ent messages

                if (!is_valid_ent(xbow) || !is_valid_ent(id))

                        return PLUGIN_CONTINUE

                

                // Not allowed to touch        

                if (g_hasXbow[id] || user_has_weapon(id, CSW_AWP))

                        return PLUGIN_CONTINUE

                

                // Give crossbow        

                give_xbow(id)

        

                // Remove crossbow on ground

                remove_entity(xbow)

        }

        return PLUGIN_CONTINUE

}

later I tried this:

Code:

// Called when player touch something,

public fw_Touch(ptr, ptd)

{

        if(get_user_flags(ptd) & BUY_FLAG)

        {

                // Invalid ent/toucher

                if(!pev_valid(ptr) || !pev_valid(ptd))

                        return FMRES_IGNORED;

        

                // Get model, toucherclass, entityclass

                new toucherclass[33], entityclass[33]

                pev(ptr, pev_classname, entityclass, charsmax(entityclass))

                pev(ptd, pev_classname, toucherclass, charsmax(toucherclass))

        

                // TOucher isn't player and entity isn't weapon

                if (!equali(toucherclass, "player") || !equali(entityclass, "weaponbox"))

                        return FMRES_IGNORED

        

                // Our world model

                new model[33]; pev(ptr, pev_model, model, charsmax(model))

                if(equali(model, W_MODEL))

                {

                        // If allowed to touch

                        if(allowed_toucher(ptd))

                        {

                                //  

                                g_hasXbow[ptd] = true

                        }

                }

        }

        return FMRES_IGNORED;

}

So it worked perfectly, vips take the crossbow from the ground and can use the crossbow normally, not vips when taking the crossbow from the ground gain the common weapon which the crossbow replaces (awp), but I have this error:

Code:

[AMXX] Displaying debug trace (plugin "amx_crossbow21.amxx", version "2.0")

[AMXX] Run time error 10: native error (native "get_user_flags")

[AMXX]    [0] amx_crossbow21.sma::fw_Touch (line 506)

I don't understand the reason for the error, in the game it's working perfectly as I want it, but the error persists.
Can anyone help me with this? how to fix this error and keep the functionality i want?

* Sorry for bad English.