Adding to HIMageList failing, cannot figure out why
===

I'm confused because I cannot establish why my ImageList_Add call is failing. I know it must be something that I am doing wrong with the Image or maybe I'm calling it wrong but I have no idea how I can go about fixing it :S Any help you can offer would be appreciated! :)

The code i'm using is below. I'm getting output on the console saying it couldn't add to the image list. From the docs,ImageList_Add will return an indice of where in the imagelist it managed to add the image so -1 is returned if it cant. 

Which is all well and good but I cannot find anywhere why/what causes the add to fail!

The code may have memory leaks, though at the moment,ive spent almost a day trying to figure out various issues with this so I just want to get it to work!

 
        HIMAGELIST imageList = ImageList_Create(20,20,ILC_COLOR16,1,2 );
    if (imageList == NULL)
    {
        printf("Error creating imagelist - dlg_create_dropdown_menu. Returning NULL\n");
        return NULL;
    }

    HBITMAP currentImage = (HBITMAP) LoadImage(NULL,"active_mdoe_icn.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE);
    if (currentImage == NULL) 
    {
       if (GetLastError()== 2) 
       {
           printf("File not found - dlg_create_dropdown_menu. Returning NULL.\n");
           return NULL;
       }
        printf("Error loading image from file - dlg_create_dropdown_menu. Returning NULL.\n");
        return NULL;
    }
    int imageIndex;
    if ( (imageIndex = ImageList_Add(imageList,currentImage,NULL)) == -1 )
    {
        printf("Error adding to the image list - dlg_create_dropdown_menu. Returning NULL.\n");
        return NULL;
    }

Thanks all, any help would be greatly received! :)
   