why GuiTextEditCtrl not show input dialog in TGB for iphone

hi all, i use GuiTextEditCtrl in the gui, but when i hit the textEditor ,the input dialog not show , OMG,is there anybody help me? the platform is iphone.
below is the code:

new GuiTextEditCtrl(mLgPassword)
{
Profile = "GuiLoginTextEditProfile";
HorizSizing = "relative";
VertSizing = "relative";
position = "70 91";
Extent = "193 26";
MinExtent = "8 2";
Visible = "1";
maxLength = "48";
historySize = "0";
text = "";
password = "1";
tabComplete = "0";
sinkAllKeyEvents = "0";
password = "1";
passwordMask = "*";
renderBackground = "0";
AltCommand = "LoginGame();";
};