set gui invisible and data saving to SQL

[seal]

Hey, i'm new in gui scripting, so this is my first gui and i need some help.

It should ask a name and save it to an SQL database and finally close de window, but it dont happen, so pls help me!

function createLoginWindow(thePlayer) 
  local X = 0.425 
  local Y = 0.425 
  local Width = 0.15 
  local Height = 0.15 
  showCursor(true, true) 
  wdwLogin = guiCreateWindow(X, Y, Width, Height, "Choose your character's name", true) 
  X = 0.25 
  Y = 0.2 
  Width = 0.5 
  Height = 0.15 
  cname = guiCreateEdit(X, Y, Width, Height, "", true, wdwLogin) 
  guiEditSetMaxLength(cname, 15) 
  X = 0.375 
  Y = 0.7 
  Width = 0.25 
  Height = 0.2 
  btnLogin = guiCreateButton(X, Y, Width, Height, "Save", true, wdwLogin) 
   addEventHandler ( "onClientGUIClick", btnLogin, saveNick, false ) 
   outputDebugString( "You got ".. cname .." hp.") -- just for debugging 
end 
  
addCommandHandler("leves", createLoginWindow) 
  
function saveNick(button) 
  if button == "left" then 
    local nickname = guiGetText ( cname ) 
    outputDebugString( "You got ".. cname .." hp.") 
    executeSQLQuery("CREATE TABLE IF NOT EXISTS players ( name TEXT)") 
    executeSQLQuery("INSERT INTO players(name) VALUES(?)", cname ) 
    guiSetVisible(wdwLogin, false) 
    showCursor (  false ) 
  end 
end 

[glowdemon1]

You could replace guiSetVisible with destroyElement(wdwLogin), but it's probably caused by the MYSQL part where I can't really help ya with.