[Typo3] ifEmpty nor working?

[Nagy Péter]

Hello List!

I have problem in 8TypoScript, and I don't understand why isn't it working.
The script:

temp.themePic.10 {
  file = GIFBUILDER
    file {
    format = jpg
    quality = 90
    XY = [10.w], [10.h]
    10 = IMAGE
    10.file {
      import = uploads/media/
      import.field = media
      import.listNum = 0
      import.field.ifEmpty = levelfield: -1, media, slide
    }...etc.

The "import.field.ifEmpty = levelfield: -1, media, slide" is not
working. I tried to fetch a picture from a page in an above level with
this line, but looks like I misunderstand something.
Any help?

NP