Unable to "push" variables from UScript to Flash

[nemirc]

Hello :-/

I'm trying to push a variable from unrealscript to flash. This is really getting on my nerves since this is not the first time I do this, but for some reason I can't do it this time, even if I've done it a lot of times before :-/

This is my unrealscirpt code, inside a GFxSomething class. I'm even going back to the basis and trying to send a simple number instead of one of the variables I actually need to send, but still can't get it to work:

function UpdateInventorySlots()
{
  local float SlotTest;

  SlotTest = 5;//EP.SlotItemId1;
  `log ("function UpdateInventorySlots " @SlotTest);

  //get variables
  InventoryMC.SetFloat("Slot1", SlotTest);
}

My flash code:

var itemData:Object = [
	{type:"item",asset:0}, //2 bottle
	{type:"item",asset:1}, //3 bloody bottle
	{type:"item",asset:2}, //4 gear
	{type:"item",asset:3}, //5 angel key
	{type:"item",asset:4}, //6 circle key
	{type:"item",asset:5}, //7 elevator key
	{type:"item",asset:6}, //8 gear key
	{type:"item",asset:7}, //9 rusty key
	{type:"item",asset:8}, //10 star key
	{type:"item",asset:9}, //lever
	{type:"item",asset:10}, //painting piece 1
	{type:"item",asset:11}, //painting piece 2
	{type:"item",asset:12}, //painting piece 3	
	{type:"item",asset:13}, //seal 1
	{type:"item",asset:14}, //seal 2
	{type:"item",asset:15}, //seal 3
	{type:"item",asset:16}, //seal 4
	{type:"item",asset:17}, //seal 5
	{type:"item",asset:18}, //seal 6
	{type:"item",asset:19}, //seal 7
	{type:"item",asset:20} //wood
	//{type:"item",asset:7,quantity:3}
];

var Slot1:Number = 1;

itemSlot1.data = itemData[Slot1];
itemSlot2.data = itemData[5];

I'm using the InventoryDemo file as a base for my experiment. This is what I did:
replaced the icons with my own icons inside the "icons" movieclip.
I have the movieclip "inventory" in "_root" that contains the grid of inventory slots, and a keyframe where I've written the code above. For this reason, I made a couple of references to that movieclip in my unreal class:

function bool Start(optional bool StartPaused = false)
{
  super.Start();
  Advance(0);

  RootMC = GetVariableObject("_root");
  InventoryMC = RootMC.GetObject("inventory");

Inside that "inventory" movie clip I have the different instances of the inventory, named from Slot1 to Slot15 or something like that.

If I use "itemslot1.data = itemData[5]" the corresponding icon appears. However, I can't seem to read the variable I'm sending from UnrealScript. I'm not sure if I've missed part of the code, or I'm loading the things in the wrong order.

Help pliz