[JoshGomez]

But if you update the pcvar the cvar won't change.

I have remove the engine & and cstrike module now, I can't get block jump to work.

public fm_cmd_start(id,uc_handle,seed)
{
    if((get_pcvar_num(cvar_execution) != 1) || (!is_user_alive(id)))
    {
        return FMRES_IGNORED;
    }
  
    new button = get_uc(uc_handle,UC_Buttons);
    
    if(g_player_downed[id])
    {
        if(button & IN_ATTACK)
        {
            button &= ~IN_ATTACK;
            set_uc(uc_handle,UC_Buttons,button);
        }
        
        if(button & IN_ATTACK2)
        {
            button &= ~IN_ATTACK2;
            set_uc(uc_handle,UC_Buttons,button);
        }
        
        if(button & IN_JUMP)
        {
            button &= ~IN_JUMP;
            set_uc(uc_handle,UC_Buttons,button);
        }
    }
    
    if(button & IN_USE)
    {
        g_player_use[id] = true;
    }
    else if(button & ~IN_USE)
    {
        g_player_use[id] = false;
    }
    
    return FMRES_HANDLED;
}