Need tweener/as2 expert for a small job

Question

very simple, i have a background tiled to fill the complete background using caurina script, i need the background to pan around  (also using caurina) when the keyboard arrow keys are pressed.
can send you the file with the background tiled.
thanks.

Answer 1

Bump
Below is the piece of code, and here you can download the FLA :
http://www.yousendit.com/transfer.php?action=check_download&ufid=S1VBUGhTVnNRR2RjR0E9PQ&ke y=a3eebdf174ed50e8144f0c62d30f397a35c92480&bid=RmNEa3NhZy9wcFUwTVE9PQ
Would appreciate the help and would pay for your efforts.
Here are the key problems:
Upon clicking and draging, tile is meant to change colour and it does, but on resizing the window, the colour resets
Upon making the window size exceedingly wide the colour function doesn't work
Tile disappears after draging about 2 tiles margin from the window edges, i need it to appear as if it doesn't finish
Tile doesn't appear in the minus, only in the plus of y and z coordinates
import caurina.transitions.*;
 import ascb.util.Proxy; 
class bg.background extends MovieClip
    private var bg:MovieClip;
        private var bgIdx:Number = 0;
    private var grad:MovieClip;
    public function background() {
        bg = this["bg"];
        grad["up"]._y = -4;
        loadStageResize();
        Tweener.addTween(this, { _alpha:100, time: .5, transition: "linear" } );
    private function resize(w:Number, h:Number) {
        grad["up"]._width = grad["down"]._width = w + 4;
        grad["down"]._y = Math.round(h - grad["down"]._height + 4);
        backgroundResize(w, h);
    private function onResize() {
        resize(Stage.width, Stage.height);
    private function loadStageResize() {
        Stage.addListener(this);
        onResize();
    private function backgroundResize(w:Number, h:Number) {
         * this will resize the background, the background is formed by many squares multiplied to fill the whole screen
        var posX:Number = 0;
        var posY:Number = 0;
        if ((bg._width < w) || (bg._height < h)) {
            var i:Number = 1;
            while (bg["copy" + i]) {
                bg["copy" + i].removeMovieClip();
                i++;
            while (posX < w) {
                bgIdx++;
                posX += bg["copy"]._width;
                var duplicate:MovieClip = bg["copy"].duplicateMovieClip("copy" + bgIdx, bg.getNextHighestDepth(), { _x:posX, _y:posY } );
                if (posX >= w) {
                    posX = -bg["copy"]._width;
                    posY += bg["copy"]._height;
                if (posY > h) {
                    break;