My question is: When I "F5" status "up", "Gui" can not close!    help.! 
client 
addEvent( "moneyn", true ) 
addEventHandler( "moneyn", getRootElement(),  
function(qian)  
  bindKey ( "F5", "down",function() 
  
        qianbao.window[1] = guiCreateWindow(0.33, 0.28, 0.25, 0.16, "钱包", true) 
        guiWindowSetSizable(qianbao.window[1], false) 
        guiSetAlpha(qianbao.window[1], 1.00) 
        qianbao.label[1] = guiCreateLabel(0.10, 0.18, 0.34, 0.24, "你的金钱:", true, qianbao.window[1]) 
        guiSetFont(qianbao.label[1], "default-bold-small") 
                guiLabelSetColor(qianbao.label[1], 247, 246, 121) 
        guiLabelSetHorizontalAlign(qianbao.label[1], "center", true) 
        guiLabelSetVerticalAlign(qianbao.label[1], "center") 
        qianbao.label[2] = guiCreateLabel(0.34, 0.38, 0.48, 0.23,"请登录!", true, qianbao.window[1]) 
        guiSetText ( qianbao.label[2], qian ) 
         guiLabelSetColor(qianbao.label[2], 213, 72, 92) 
        guiLabelSetVerticalAlign(qianbao.label[2], "center") 
        qianbao.staticimage[1] = guiCreateStaticImage(0.04, 0.18, 0.92, 0.76, ":login_mysql/images/qianbao.png", true, qianbao.window[1]) 
        guiSetAlpha(qianbao.staticimage[1], 0.23)            
        guiSetProperty(qianbao.button[1], "NormalTextColour", "FFAAAAAA") 
end 
) 
         
    end 
) 
 bindKey ( "F5", "up",function() 
guiSetVisible(qianbao.window[1],false) 
end 
) 
 
server 
addEventHandler("onPlayerJoin", getRootElement(), 
    function(player) 
setTimer(function() 
    handler = mysql_connect( host, username, password, db ) 
if handler then 
local result = mysql_query(handler, "SELECT Money FROM players WHERE Username='crazyde21'")-- Execute the query 
for result,row in mysql_rows(result) do -- Iterate through all the result rows 
  mysql_field_seek(result, 1) -- Reset the field cursor to the first field 
  for k,qian in ipairs(row) do 
    local field = mysql_fetch_field(result) -- Retreive the field data 
 triggerClientEvent("moneyn",getRootElement(),qian) 
  end 
  end 
  end 
  end,10000,0) 
    end 
    )