[TYPO3] to make a transparent background image with gifbuilder

[Gideon So]

Hi,

  I am trying to make a transparent background image. I prepared a
transparent image all clear.gif And here is my typoscript for the image:

lib.header = IMAGE
lib.header.file = GIFBUILDER
lib.header.file {
  XY = 200, [10.h]
  10 = IMAGE
  10.file = fileadmin/templates/images/clear.gif
  10.file.width= 200
  20 = TEXT
  20.text.data = page:title
  20.offset = 0,120
  20.niceText = 1
  20.align=center
  20.fontSize= 40
  20.fontFile = fileadmin/templates/fonts/impact.ttf
  20.fontColor = yellow
}

   This doesn't work. It shows me a image with white background. Any
hints for this??

Gideon