Login form in the east region

[Manb]

hi,
I used in my web application the complexe (border, accordion,tab )so I
want to creat a login form in the east region but I dont understand
the error in my source code:

/////////East Region
$east = new PhpExt_Panel();
$east->setTitle(utf8_encode("Customer informations"))
->setCollapsible(true)
->setWidth(200);


///////////////////////////////////////////////////////////////////////////////////////////////////////
//****************************** Simple Form
$simple = new PhpExt_Form_FormPanel();
$simple->setLabelWidth(75)
->setUrl("login.php")
->setFrame(true)
->setBodyStyle("padding:5px 5px 0")
->setWidth(225)
->setDefaults(new PhpExt_Config_ConfigObject(array
("width"=>100)))
->setDefaultType("textfield")
->setMethod(POST)
->setStandardSubmit(true);

$login = PhpExt_Form_TextField::createTextField
("login","User")
->setAllowBlank(false);
$pass = PhpExt_Form_TextField::createTextField("pass","Password");

$submit = PhpExt_Button::createTextButton("Connect")
->setType(PhpExt_Button::BUTTON_TYPE_SUBMIT);

$simple->addItem($login)
->addItem($pass);

$simple->addButton($submit);

$east->addItem($simple);

$viewport->addItem($east,
PhpExt_Layout_BorderLayoutData::createEastRegion()
->setSplit(true)
->setMinSize(175)
->setMaxSize(400)
->setMargins("0 5 0 0"));
.........
..........
echo PhpExt_Ext::OnReady(
$viewport->getJavascript(false, "v"),
$viewport->render("viewport"),
$store->getJavascript(false, "store"),
$store->load()
);




$east->addItem($simple);

$viewport->addItem($east,
PhpExt_Layout_BorderLayoutData::createEastRegion()
->setSplit(true)
->setMinSize(175)
->setMaxSize(400)
->setMargins("0 5 0 0"));

Thank in advance for your help.