[TYPO3] Read params from Plugin

[frank]

Hello:
I would like to read some params of a plugin from code.
I have this code in setup of my template:

plugin.tx_sgzfelib {

 icon {
  edit = EXT:sg_zfelib/img/edit_12.gif
  edit_disabled = EXT:sg_zfelib/img/edit_disabled_12.gif
  add = EXT:sg_zfelib/img/add_12.gif
  add_disabled = EXT:sg_zfelib/img/add_disabled_12.gif
  view = EXT:sg_zfelib/img/view_12.gif
  view_disabled = EXT:sg_zfelib/img/view_disabled_12.gif
 }


 image.s {
  imgWrap = |<br />
  implode = - - -<br />
  allWrap = Small Images:<br />
  conf.file.maxW = 160
  conf.file.maxH = 140
 }

 image.m {
  imgWrap = |<br />
  capWrap = <i>|</i><br />
  tmpl = ###img######cap###
  implode = - - -<br />
  allWrap = List of Images - Medium sized:<br />
  firstWrap = First Image - Medium sized:<br />
  conf.file.maxW = 320
  conf.file.maxH = 280
 }
 image.l {
  imgWrap = |<br />
  implode = - - -<br />
  allWrap = Large Images:<br />
  conf.file.maxW = 640
  conf.file.maxH = 560
 }

 tx_sgzfelib.conf {
  images.viewInForm = 1
  pdfImage = IMAGE
  pdfImage.file = fileadminquickstart/img1.jpg
 }

}

I want to acces to pdfImage value from the code of the tx_sgzfelib plugin .
I try to access to it through $PCA['conf']['pdfImage']['file'].
The variable no contains anything.
What do I do wrong?

Thank you very much.

Frank.