Kees, is your profile signature current (Mac OS X 10.5.x)? In Mt. Lion or Lion the User Library is hidden.
Frank told you, how to open the library from the Finder's "Go" menu - and I told you in your other thread - look again:
Re: Where are ICC profiles stored in Aperture? Formerly they were stored in the home map. I make my own ICC profiles, with Color Munki. I can't find them back in the /library/colorSync/Profiles. I'm using a Canon printer iPF5100
You can reveal it from the Finder's "Go" menu in the main menu bar:
Finder > Go
Then hold down to options-key ⌥, until Library appears in the drop-down menu. Select it and open the Library.
If you follow the instructions in my reply or Léonie's post you will be able to see your Library folder.
I didn;t realize you had asked the same question in another post and had been answered by Léonie. It is best not to post the same question multiple times as it just clogs up the list here and accomplishes nothing.
It is also a good idea to respond to those who have given their own time to help you.