Hi Rita,
Looking at the listing you've provided it's pretty clear that you are getting into one of the THREE different Library directories, but not the one that Artie keeps trying to send you to.....the one you want is found by copying and pasting this address:
~/Library/Preferences
into the Finder's "Go to Folder" pull down under the Go menu.
If you try to just type the address, you will more times than not get it wrong and end up somewhere else.
The little symbol in the front of that address is actually a Tilde not a dash.....the Tilde is shorthand for getting to the Library that lives in your User Home Directory (and it is normally invisible so that folks can't find it to mess up the contents by mistake).
You'll know that you got to the correct Library if the listing includes stuff that looks more like this:
com.apple.Accessibility.plist
com.apple.accounts.dom.plist
com.apple.accounts.plist
com.apple.accountsd.plist
com.apple.ActivityMonitor.plist
com.apple.AddressBook.abd.plist
com.apple.AddressBook.plist
com.apple.AddressBook.plist.lockfile
com.apple.AddressBook.sync.plist.lockfile
com.apple.AddressBookSourceSync.plist
com.apple.AddressBookSourceSync.plist.lockfile
com.apple.AdLib.plist
com.apple.adminframework.plist
com.apple.adminframework.plist.lockfile
com.apple.airplay.plist
