Problems with positioners

[marmistrz]

Hi,
I've got some problems with positioners:
My code is

import QtQuick 1.1
import com.nokia.meego 1.0

Page
{
// property int items: 5
// property int itemheight: screenheight / items - screenheight
id: mainPage
tools: maintoolbar

Loader
{
id: goLoader
onLoaded: console.log("Show lyrics page loaded")
}
Loader
{
id: selectTrackLoader
onLoaded: console.log("Select track page loaded")
}

EditTrackDataSheet
{
id: edittrackdatasheet
}

Column
{
width: parent.width
Rectangle
{
color: "#4591ff"
height: 72
width: parent.width
Text
{
text: "Search for lyrics"
color: "white"
anchors
{
verticalCenter: parent.verticalCenter
left: parent.left
leftMargin: 30
}
font.pixelSize: 48
}
}

CheckBox
{
id: tracksrc
text: "Select track from library" // label isn't needed with PageStackWindow
checked: true
anchors.horizontalCenter: parent.horizontalCenter
//checkable: true
}

// button for selecting a track from the media library
Row
{
Text
{
id: selectedtracktext
text: "Selected track: "
}

Button
{
id: selecttrack
checkable: false
text: "<i>No track selected</i>"
width: parent.width - selectedtracktext.width
onClicked:
{
if ( tracksrc.checked )
{
selectTrackLoader.source = "SelectTrackPage.qml"
pageStack.push(selectTrackLoader.item)
}
else
{
edittrackdatasheet.open()
}
}
}
}

//line edits for entering the data manually

Button
{
id: lyricssrcbutton
text: lyricssrcdialog.model.get(lyricssrcdialog.selected Index).name
width: parent.width
onClicked: { lyricssrcdialog.open(); }
}

Button
{
id: go
text: "Go!"
width: parent.width
onClicked:
{
goLoader.source = "ShowLyricsPage.qml"
pageStack.push(goLoader.item)
}
}
}
ToolBarLayout
{
id: maintoolbar
ToolIcon
{
iconId: "toolbar-back"
onClicked: quitdialog.open()
}
}
SelectionDialog
{
id: lyricssrcdialog
titleText: "Download source"
selectedIndex: 0
model: ListModel
{
ListElement { name: "AZLyrics" }
}
}

QueryDialog
{
id: notimplementeddialog
acceptButtonText: "OK"
message: "Sorry! Not implemented yet!"
}

QueryDialog
{
id: quitdialog
acceptButtonText: "OK"
rejectButtonText: "Cancel"
message: "Are you sure you want to quit MaeLyrica?"
onAccepted: Qt.quit()
}

}


Unfortunately, the Row is positioned somewhere in the top (as in screenshot) and should be below the checkbox.
What am I doing wrong?
Thanks in advance